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CVE-2026-101061 (GCVE-0-2026-101061)

Vulnerability from nvd – Published: 2026-09-27 17:02 – Updated: 2026-09-30 14:14

Title

utcp-gql and utcp-websocket before 1.1.1 SSRF via URL validation bypass

Summary

utcp-gql before 1.1.1 and utcp-websocket before 1.1.1 contain server-side request forgery vulnerabilities due to incomplete application of CVE-2026-44661 fixes. The GraphQL plugin uses a vulnerable prefix check allowing bypass URLs like http://127.0.0.1.attacker.example, while the WebSocket plugin performs no URL validation despite documented security requirements. Attackers can force connections to internal services and cloud metadata endpoints by supplying malicious tool URLs in call templates, and receive configured API keys and OAuth tokens sent to attacker-controlled hosts.

Severity

2.3 (Low)


                        
                          CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N

4.7 (Medium)


                        
                          CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-30 14:14 UTC

CWE

CWE-918 - Server-Side Request Forgery (SSRF)

Assigner

VulnCheck mitre root Scorecard

References

2 references

URL	Tags
https://github.com/universal-tool-calling-protoco…	vendor-advisory
https://www.vulncheck.com/advisories/utcp-gql-and…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
universal-tool-calling-protocol	python-utcp	Affected: 0 , < 1.1.1 (semver) Unaffected: 1.1.1 (semver)

Date Public

2026-06-14 00:00

Credits

hariantara

Show details on NVD website

JSON

To clipboard

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CVE-2026-101060 (GCVE-0-2026-101060)

Vulnerability from nvd – Published: 2026-09-27 17:02 – Updated: 2026-09-28 13:11

Title

python-utcp before 1.1.4 SSRF via unvalidated HTTP redirects

Summary

python-utcp versions before 1.1.4 contain a server-side request forgery vulnerability in HttpCommunicationProtocol.call_tool that validates the initial tool URL but follows HTTP redirects without re-validating the target. Attackers controlling a tool endpoint can return a 302 redirect to internal services, allowing the UTCP client to reach cloud metadata endpoints or internal HTTP services and return their response bodies to the caller.

Severity

8.4 (High)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:L/VA:N/SC:H/SI:L/SA:N

8.2 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-28 13:11 UTC

CWE

CWE-918 - Server-Side Request Forgery (SSRF)

Assigner

VulnCheck mitre root Scorecard

References

2 references

URL	Tags
https://github.com/universal-tool-calling-protoco…	vendor-advisory
https://www.vulncheck.com/advisories/python-utcp-…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
universal-tool-calling-protocol	python-utcp	Affected: 0 , < 1.1.4 (semver) Unaffected: 1.1.4 (semver)

Date Public

2026-06-14 00:00

Credits

lexdotdev

Show details on NVD website

JSON

To clipboard

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CVE-2026-101059 (GCVE-0-2026-101059)

Vulnerability from nvd – Published: 2026-09-27 17:02 – Updated: 2026-09-28 14:02

Title

utcp-http before 1.1.4 OAuth2 tokenUrl Trust Boundary Bypass

Summary

utcp-http before 1.1.4 fails to validate the OAuth2 tokenUrl field from remote OpenAPI specifications, allowing attackers to redirect credential submission to arbitrary endpoints. When a victim registers an attacker-controlled OpenAPI spec and invokes a generated OAuth2-protected tool, the library POSTs the victim's client_id and client_secret to the attacker-supplied token endpoint without URL validation.

Severity

7.1 (High)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N

7.1 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-28 14:00 UTC

CWE

CWE-918 - Server-Side Request Forgery (SSRF)

Assigner

VulnCheck mitre root Scorecard

References

2 references

URL	Tags
https://github.com/universal-tool-calling-protoco…	vendor-advisory
https://www.vulncheck.com/advisories/utcp-http-be…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
universal-tool-calling-protocol	python-utcp	Affected: 0 , < 1.1.4 (semver) Unaffected: 1.1.4 (semver)

Date Public

2026-06-14 00:00

Credits

EQSTLab 232-323

Show details on NVD website

JSON

To clipboard

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CVE-2026-101058 (GCVE-0-2026-101058)

Vulnerability from nvd – Published: 2026-09-27 17:02 – Updated: 2026-09-30 22:06

Title

python-utcp before 1.1.12 SSRF via Remote HTTP Manual

Summary

python-utcp (pip package utcp-http) before 1.1.12 does not verify whether tool URLs declared in a hand-written UTCP manual point at the agent's own loopback interface when that manual is discovered from a remote, non-loopback origin. Because ensure_secure_url intentionally permits loopback HTTP for local development and native manuals bypassed the loopback check performed by the OpenAPI converter, an attacker who can serve a UTCP manual that a victim registers can cause the client to issue requests to services bound only to 127.0.0.1 on the victim host and have the response bodies returned to the caller (server-side request forgery). The http, sse and streamable_http protocols are all affected. Reach is limited to loopback, and exploitation further requires a loopback service that answers unauthenticated requests with useful data. Fixed in utcp-http 1.1.12, which rejects manuals fetched from a non-loopback origin that declare loopback tool URLs, keyed off the final post-redirect discovery URL.

Severity

7.1 (High)


                        
                          CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:H/VI:L/VA:N/SC:H/SI:L/SA:N

6.9 (Medium)


                        
                          CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:L/A:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-30 22:06 UTC

CWE

CWE-918 - Server-Side Request Forgery (SSRF)

Assigner

VulnCheck mitre root Scorecard

References

2 references

URL	Tags
https://github.com/universal-tool-calling-protoco…	vendor-advisory
https://www.vulncheck.com/advisories/python-utcp-…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
universal-tool-calling-protocol	python-utcp	Affected: 0 , < 1.1.12 (semver) Unaffected: 1.1.12 (semver)

Date Public

2026-09-05 00:00

Credits

EQSTLab 232-323

Show details on NVD website

JSON

To clipboard

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CVE-2026-101057 (GCVE-0-2026-101057)

Vulnerability from nvd – Published: 2026-09-27 17:02 – Updated: 2026-09-30 15:38

Title

utcp-mcp before 1.1.3 SSRF via unvalidated MCP server URL

Summary

utcp-mcp (the MCP plugin of python-utcp) through 1.1.2 connects to the HTTP and WebSocket MCP server URLs given in a call template's mcpServers configuration without the ensure_secure_url validation that the HTTP-family plugins apply, so the HTTPS/WSS-or-loopback rule is not enforced. A call template naming a plain-HTTP, non-loopback MCP server URL is dialed as configured, exposing the MCP handshake to network interception and permitting cleartext connections to internal hosts. The mcpServers configuration is operator-authored rather than remote data, and the connection is an MCP handshake rather than an arbitrary request returning a body, which limits practical exploitation; the OAuth2 token_url credential path described in the original report was not reachable in the affected versions, because the OAuth2 handler was never invoked and the call template's auth field was not read. Fixed in utcp-mcp 1.1.3, which validates server URLs before any connection is made.

Severity

2.3 (Low)


                        
                          CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

3.1 (Low)


                        
                          CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-30 15:37 UTC

CWE

CWE-319 - Cleartext Transmission of Sensitive Information

Assigner

VulnCheck mitre root Scorecard

References

2 references

URL	Tags
https://github.com/universal-tool-calling-protoco…	vendor-advisory
https://www.vulncheck.com/advisories/utcp-mcp-bef…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
universal-tool-calling-protocol	python-utcp	Affected: 0 , < 1.1.3 (semver) Unaffected: 1.1.3 (semver)

Date Public

2026-09-05 00:00

Credits

CyberKareem

Show details on NVD website

JSON

To clipboard

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CVE-2026-12210 (GCVE-0-2026-12210)

Vulnerability from nvd – Published: 2026-06-15 02:30 – Updated: 2026-06-15 13:19

Title

universal-tool-calling-protocol python-utcp utcp-gql/utcp-websocket server-side request forgery

Summary

A vulnerability was detected in universal-tool-calling-protocol python-utcp 1.1.0. This affects an unknown function of the component utcp-gql/utcp-websocket. Performing a manipulation results in server-side request forgery. The attack can be initiated remotely. The exploit is now public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

Severity

5.3 (Medium)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P

6.3 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R

6.3 (Medium)


                        
                          CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-06-15 13:19 UTC

CWE

CWE-918 - Server-Side Request Forgery

Assigner

VulDB mitre root Scorecard

References

7 references

URL	Tags
https://vuldb.com/vuln/370852	vdb-entry
https://vuldb.com/vuln/370852/cti	signaturepermissions-required
https://vuldb.com/cve/CVE-2026-12210	third-party-advisory
https://vuldb.com/submit/832542	third-party-advisory
https://github.com/universal-tool-calling-protoco…	issue-tracking
https://github.com/gola-leya/cve_submit/issues/1	exploitissue-tracking
https://github.com/universal-tool-calling-protoco…	product

Impacted products

1 product

Vendor	Product	Version
universal-tool-calling-protocol	python-utcp	Affected: 1.1.0 cpe:2.3:a:universal-tool-calling-protocol:python-utcp::::::::

Credits

gola (VulDB User) VulDB CNA Team

Show details on NVD website

JSON

To clipboard

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CVE-2026-45366 (GCVE-0-2026-45366)

Vulnerability from nvd – Published: 2026-05-28 20:38 – Updated: 2026-05-29 13:56

Title

typescript-utcp: SSRF via attacker-controlled OpenAPI servers[0].url in HTTP communication protocol

Summary

typescript-utcp is a typescript implementation of UTCP. Prior to 1.1.2, the @utcp/http package is vulnerable to a blind Server-Side Request Forgery (SSRF) caused by a trust-boundary inconsistency between manual discovery and tool invocation. registerManual() validates the discovery URL against an HTTPS / loopback allowlist, but callTool() reuses the resolved toolCallTemplate.url directly without revalidating, and the OpenApiConverter blindly trusts whatever servers[0].url an attacker-hosted spec declares. An attacker who hosts a malicious OpenAPI spec on a legitimate HTTPS endpoint can declare e.g. servers: [{ url: "http://127.0.0.1:9090" }] or servers: [{ url: "http://169.254.169.254" }]; the converter then produces tools whose URL points at internal services on the agent host. This vulnerability is fixed in 1.1.2.

Severity

4.7 (Medium)


                        
                          CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-05-29 13:56 UTC

CWE

CWE-918 - Server-Side Request Forgery (SSRF)

Assigner

GitHub_M mitre root Scorecard

References

1 reference

URL	Tags
https://github.com/universal-tool-calling-protoco…	x_refsource_CONFIRM

Impacted products

1 product

Vendor	Product	Version
universal-tool-calling-protocol	typescript-utcp	Affected: < 1.1.2

Show details on NVD website

JSON

To clipboard

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CVE-2026-45370 (GCVE-0-2026-45370)

Vulnerability from nvd – Published: 2026-05-14 20:14 – Updated: 2026-05-15 11:23

Title

python-utcp: Full Process Environment Exposed to CLI Subprocess - Secrets Leakage via Command Injection

Summary

python-utcp is the python implementation of UTCP. Prior to 1.1.3, _prepare_environment() in cli_communication_protocol.py passes a full copy of os.environ to every CLI subprocess. When combined with CVE-2026-45369, an attacker can exfiltrate all process-level secrets in a single tool call. This vulnerability is fixed in 1.1.3.

Severity

7.7 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-05-15 11:23 UTC

CWE

CWE-526 - Cleartext Storage of Sensitive Information in an Environment Variable

Assigner

GitHub_M mitre root Scorecard

References

1 reference

URL	Tags
https://github.com/universal-tool-calling-protoco…	x_refsource_CONFIRM

Impacted products

1 product

Vendor	Product	Version
universal-tool-calling-protocol	python-utcp	Affected: < 1.1.2

Show details on NVD website

JSON

To clipboard

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CVE-2026-45369 (GCVE-0-2026-45369)

Vulnerability from nvd – Published: 2026-05-14 20:14 – Updated: 2026-05-16 01:00

Title

python-utcp: Command Injection via Unsanitized Argument Substitution in CLI Communication Protocol

Summary

python-utcp is the python implementation of UTCP. Prior to 1.1.3, the _substitute_utcp_args method in cli_communication_protocol.py inserts user-controlled tool_args values directly into shell command strings without any sanitization or escaping. These commands are then executed via /bin/bash -c (Unix) or powershell.exe -Command (Windows), allowing an attacker to inject arbitrary shell commands. This vulnerability is fixed in 1.1.3.

Severity

8.3 (High)


                        
                          CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H

SSVC

Exploitation: poc Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-05-16 00:59 UTC

CWE

CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

Assigner

GitHub_M mitre root Scorecard

References

1 reference

URL	Tags
https://github.com/universal-tool-calling-protoco…	x_refsource_CONFIRM

Impacted products

1 product

Vendor	Product	Version
universal-tool-calling-protocol	python-utcp	Affected: < 1.1.2

Show details on NVD website

JSON

To clipboard

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CVE-2026-44661 (GCVE-0-2026-44661)

Vulnerability from nvd – Published: 2026-05-14 20:12 – Updated: 2026-05-15 11:25

Title

python-utcp: SSRF via attacker-controlled OpenAPI servers[0].url in HTTP communication protocol

Summary

python-utcp is the python implementation of UTCP. Prior to 1.1.3, the utcp-http plugin is vulnerable to a blind Server-Side Request Forgery (SSRF) caused by a trust-boundary inconsistency between manual discovery and tool invocation. register_manual() validates the discovery URL against an HTTPS / loopback allowlist, but call_tool() and call_tool_streaming() reuse the resolved tool_call_template.url directly without revalidating, and the OpenAPI converter blindly trusts whatever servers[0].url an attacker-hosted spec declares. An attacker who hosts a malicious OpenAPI spec on a legitimate HTTPS endpoint can declare e.g. servers: [{ url: "http://127.0.0.1:9090" }] or servers: [{ url: "http://169.254.169.254" }]; the OpenAPI converter then produces tools whose URL points at internal services on the agent host. All three HTTP-class protocols (utcp_http.http, utcp_http.streamable_http, utcp_http.sse) shared the same gap. This vulnerability is fixed in 1.1.3.

Severity

4.7 (Medium)


                        
                          CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-05-15 11:24 UTC

CWE

CWE-918 - Server-Side Request Forgery (SSRF)

Assigner

GitHub_M mitre root Scorecard

References

1 reference

URL	Tags
https://github.com/universal-tool-calling-protoco…	x_refsource_CONFIRM

Impacted products

1 product

Vendor	Product	Version
universal-tool-calling-protocol	python-utcp	Affected: < 1.1.2

Show details on NVD website

JSON

To clipboard

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CVE-2026-101061 (GCVE-0-2026-101061)

Vulnerability from cvelistv5 – Published: 2026-09-27 17:02 – Updated: 2026-09-30 14:14

Title

utcp-gql and utcp-websocket before 1.1.1 SSRF via URL validation bypass

Summary

utcp-gql before 1.1.1 and utcp-websocket before 1.1.1 contain server-side request forgery vulnerabilities due to incomplete application of CVE-2026-44661 fixes. The GraphQL plugin uses a vulnerable prefix check allowing bypass URLs like http://127.0.0.1.attacker.example, while the WebSocket plugin performs no URL validation despite documented security requirements. Attackers can force connections to internal services and cloud metadata endpoints by supplying malicious tool URLs in call templates, and receive configured API keys and OAuth tokens sent to attacker-controlled hosts.

Severity

2.3 (Low)


                        
                          CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N

4.7 (Medium)


                        
                          CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-30 14:14 UTC

CWE

CWE-918 - Server-Side Request Forgery (SSRF)

Assigner

VulnCheck mitre root Scorecard

References

2 references

URL	Tags
https://github.com/universal-tool-calling-protoco…	vendor-advisory
https://www.vulncheck.com/advisories/utcp-gql-and…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
universal-tool-calling-protocol	python-utcp	Affected: 0 , < 1.1.1 (semver) Unaffected: 1.1.1 (semver)

Date Public

2026-06-14 00:00

Credits

hariantara

Show details on NVD website

JSON

To clipboard

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CVE-2026-101060 (GCVE-0-2026-101060)

Vulnerability from cvelistv5 – Published: 2026-09-27 17:02 – Updated: 2026-09-28 13:11

Title

python-utcp before 1.1.4 SSRF via unvalidated HTTP redirects

Summary

python-utcp versions before 1.1.4 contain a server-side request forgery vulnerability in HttpCommunicationProtocol.call_tool that validates the initial tool URL but follows HTTP redirects without re-validating the target. Attackers controlling a tool endpoint can return a 302 redirect to internal services, allowing the UTCP client to reach cloud metadata endpoints or internal HTTP services and return their response bodies to the caller.

Severity

8.4 (High)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:L/VA:N/SC:H/SI:L/SA:N

8.2 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-28 13:11 UTC

CWE

CWE-918 - Server-Side Request Forgery (SSRF)

Assigner

VulnCheck mitre root Scorecard

References

2 references

URL	Tags
https://github.com/universal-tool-calling-protoco…	vendor-advisory
https://www.vulncheck.com/advisories/python-utcp-…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
universal-tool-calling-protocol	python-utcp	Affected: 0 , < 1.1.4 (semver) Unaffected: 1.1.4 (semver)

Date Public

2026-06-14 00:00

Credits

lexdotdev

Show details on NVD website

JSON

To clipboard

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CVE-2026-101059 (GCVE-0-2026-101059)

Vulnerability from cvelistv5 – Published: 2026-09-27 17:02 – Updated: 2026-09-28 14:02

Title

utcp-http before 1.1.4 OAuth2 tokenUrl Trust Boundary Bypass

Summary

utcp-http before 1.1.4 fails to validate the OAuth2 tokenUrl field from remote OpenAPI specifications, allowing attackers to redirect credential submission to arbitrary endpoints. When a victim registers an attacker-controlled OpenAPI spec and invokes a generated OAuth2-protected tool, the library POSTs the victim's client_id and client_secret to the attacker-supplied token endpoint without URL validation.

Severity

7.1 (High)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N

7.1 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-28 14:00 UTC

CWE

CWE-918 - Server-Side Request Forgery (SSRF)

Assigner

VulnCheck mitre root Scorecard

References

2 references

URL	Tags
https://github.com/universal-tool-calling-protoco…	vendor-advisory
https://www.vulncheck.com/advisories/utcp-http-be…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
universal-tool-calling-protocol	python-utcp	Affected: 0 , < 1.1.4 (semver) Unaffected: 1.1.4 (semver)

Date Public

2026-06-14 00:00

Credits

EQSTLab 232-323

Show details on NVD website

JSON

To clipboard

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CVE-2026-101058 (GCVE-0-2026-101058)

Vulnerability from cvelistv5 – Published: 2026-09-27 17:02 – Updated: 2026-09-30 22:06

Title

python-utcp before 1.1.12 SSRF via Remote HTTP Manual

Summary

python-utcp (pip package utcp-http) before 1.1.12 does not verify whether tool URLs declared in a hand-written UTCP manual point at the agent's own loopback interface when that manual is discovered from a remote, non-loopback origin. Because ensure_secure_url intentionally permits loopback HTTP for local development and native manuals bypassed the loopback check performed by the OpenAPI converter, an attacker who can serve a UTCP manual that a victim registers can cause the client to issue requests to services bound only to 127.0.0.1 on the victim host and have the response bodies returned to the caller (server-side request forgery). The http, sse and streamable_http protocols are all affected. Reach is limited to loopback, and exploitation further requires a loopback service that answers unauthenticated requests with useful data. Fixed in utcp-http 1.1.12, which rejects manuals fetched from a non-loopback origin that declare loopback tool URLs, keyed off the final post-redirect discovery URL.

Severity

7.1 (High)


                        
                          CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:H/VI:L/VA:N/SC:H/SI:L/SA:N

6.9 (Medium)


                        
                          CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:L/A:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-30 22:06 UTC

CWE

CWE-918 - Server-Side Request Forgery (SSRF)

Assigner

VulnCheck mitre root Scorecard

References

2 references

URL	Tags
https://github.com/universal-tool-calling-protoco…	vendor-advisory
https://www.vulncheck.com/advisories/python-utcp-…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
universal-tool-calling-protocol	python-utcp	Affected: 0 , < 1.1.12 (semver) Unaffected: 1.1.12 (semver)

Date Public

2026-09-05 00:00

Credits

EQSTLab 232-323

Show details on NVD website

JSON

To clipboard

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CVE-2026-101057 (GCVE-0-2026-101057)

Vulnerability from cvelistv5 – Published: 2026-09-27 17:02 – Updated: 2026-09-30 15:38

Title

utcp-mcp before 1.1.3 SSRF via unvalidated MCP server URL

Summary

utcp-mcp (the MCP plugin of python-utcp) through 1.1.2 connects to the HTTP and WebSocket MCP server URLs given in a call template's mcpServers configuration without the ensure_secure_url validation that the HTTP-family plugins apply, so the HTTPS/WSS-or-loopback rule is not enforced. A call template naming a plain-HTTP, non-loopback MCP server URL is dialed as configured, exposing the MCP handshake to network interception and permitting cleartext connections to internal hosts. The mcpServers configuration is operator-authored rather than remote data, and the connection is an MCP handshake rather than an arbitrary request returning a body, which limits practical exploitation; the OAuth2 token_url credential path described in the original report was not reachable in the affected versions, because the OAuth2 handler was never invoked and the call template's auth field was not read. Fixed in utcp-mcp 1.1.3, which validates server URLs before any connection is made.

Severity

2.3 (Low)


                        
                          CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

3.1 (Low)


                        
                          CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-30 15:37 UTC

CWE

CWE-319 - Cleartext Transmission of Sensitive Information

Assigner

VulnCheck mitre root Scorecard

References

2 references

URL	Tags
https://github.com/universal-tool-calling-protoco…	vendor-advisory
https://www.vulncheck.com/advisories/utcp-mcp-bef…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
universal-tool-calling-protocol	python-utcp	Affected: 0 , < 1.1.3 (semver) Unaffected: 1.1.3 (semver)

Date Public

2026-09-05 00:00

Credits

CyberKareem

Show details on NVD website

JSON

To clipboard

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CVE-2026-12210 (GCVE-0-2026-12210)

Vulnerability from cvelistv5 – Published: 2026-06-15 02:30 – Updated: 2026-06-15 13:19

Title

universal-tool-calling-protocol python-utcp utcp-gql/utcp-websocket server-side request forgery

Summary

A vulnerability was detected in universal-tool-calling-protocol python-utcp 1.1.0. This affects an unknown function of the component utcp-gql/utcp-websocket. Performing a manipulation results in server-side request forgery. The attack can be initiated remotely. The exploit is now public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

Severity

5.3 (Medium)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P

6.3 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R

6.3 (Medium)


                        
                          CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-06-15 13:19 UTC

CWE

CWE-918 - Server-Side Request Forgery

Assigner

VulDB mitre root Scorecard

References

7 references

URL	Tags
https://vuldb.com/vuln/370852	vdb-entry
https://vuldb.com/vuln/370852/cti	signaturepermissions-required
https://vuldb.com/cve/CVE-2026-12210	third-party-advisory
https://vuldb.com/submit/832542	third-party-advisory
https://github.com/universal-tool-calling-protoco…	issue-tracking
https://github.com/gola-leya/cve_submit/issues/1	exploitissue-tracking
https://github.com/universal-tool-calling-protoco…	product

Impacted products

1 product

Vendor	Product	Version
universal-tool-calling-protocol	python-utcp	Affected: 1.1.0 cpe:2.3:a:universal-tool-calling-protocol:python-utcp::::::::

Credits

gola (VulDB User) VulDB CNA Team

Show details on NVD website

JSON

To clipboard

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CVE-2026-45366 (GCVE-0-2026-45366)

Vulnerability from cvelistv5 – Published: 2026-05-28 20:38 – Updated: 2026-05-29 13:56

Title

typescript-utcp: SSRF via attacker-controlled OpenAPI servers[0].url in HTTP communication protocol

Summary

typescript-utcp is a typescript implementation of UTCP. Prior to 1.1.2, the @utcp/http package is vulnerable to a blind Server-Side Request Forgery (SSRF) caused by a trust-boundary inconsistency between manual discovery and tool invocation. registerManual() validates the discovery URL against an HTTPS / loopback allowlist, but callTool() reuses the resolved toolCallTemplate.url directly without revalidating, and the OpenApiConverter blindly trusts whatever servers[0].url an attacker-hosted spec declares. An attacker who hosts a malicious OpenAPI spec on a legitimate HTTPS endpoint can declare e.g. servers: [{ url: "http://127.0.0.1:9090" }] or servers: [{ url: "http://169.254.169.254" }]; the converter then produces tools whose URL points at internal services on the agent host. This vulnerability is fixed in 1.1.2.

Severity

4.7 (Medium)


                        
                          CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-05-29 13:56 UTC

CWE

CWE-918 - Server-Side Request Forgery (SSRF)

Assigner

GitHub_M mitre root Scorecard

References

1 reference

URL	Tags
https://github.com/universal-tool-calling-protoco…	x_refsource_CONFIRM

Impacted products

1 product

Vendor	Product	Version
universal-tool-calling-protocol	typescript-utcp	Affected: < 1.1.2

Show details on NVD website

JSON

To clipboard

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                "id": "CVE-2026-45366",
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CVE-2026-45369 (GCVE-0-2026-45369)

Vulnerability from cvelistv5 – Published: 2026-05-14 20:14 – Updated: 2026-05-16 01:00

Title

python-utcp: Command Injection via Unsanitized Argument Substitution in CLI Communication Protocol

Summary

python-utcp is the python implementation of UTCP. Prior to 1.1.3, the _substitute_utcp_args method in cli_communication_protocol.py inserts user-controlled tool_args values directly into shell command strings without any sanitization or escaping. These commands are then executed via /bin/bash -c (Unix) or powershell.exe -Command (Windows), allowing an attacker to inject arbitrary shell commands. This vulnerability is fixed in 1.1.3.

Severity

8.3 (High)


                        
                          CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H

SSVC

Exploitation: poc Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-05-16 00:59 UTC

CWE

CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

Assigner

GitHub_M mitre root Scorecard

References

1 reference

URL	Tags
https://github.com/universal-tool-calling-protoco…	x_refsource_CONFIRM

Impacted products

1 product

Vendor	Product	Version
universal-tool-calling-protocol	python-utcp	Affected: < 1.1.2

Show details on NVD website

JSON

To clipboard

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CVE-2026-45370 (GCVE-0-2026-45370)

Vulnerability from cvelistv5 – Published: 2026-05-14 20:14 – Updated: 2026-05-15 11:23

Title

python-utcp: Full Process Environment Exposed to CLI Subprocess - Secrets Leakage via Command Injection

Summary

python-utcp is the python implementation of UTCP. Prior to 1.1.3, _prepare_environment() in cli_communication_protocol.py passes a full copy of os.environ to every CLI subprocess. When combined with CVE-2026-45369, an attacker can exfiltrate all process-level secrets in a single tool call. This vulnerability is fixed in 1.1.3.

Severity

7.7 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-05-15 11:23 UTC

CWE

CWE-526 - Cleartext Storage of Sensitive Information in an Environment Variable

Assigner

GitHub_M mitre root Scorecard

References

1 reference

URL	Tags
https://github.com/universal-tool-calling-protoco…	x_refsource_CONFIRM

Impacted products

1 product

Vendor	Product	Version
universal-tool-calling-protocol	python-utcp	Affected: < 1.1.2

Show details on NVD website

JSON

To clipboard

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    "adp": [
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CVE-2026-44661 (GCVE-0-2026-44661)

Vulnerability from cvelistv5 – Published: 2026-05-14 20:12 – Updated: 2026-05-15 11:25

Title

python-utcp: SSRF via attacker-controlled OpenAPI servers[0].url in HTTP communication protocol

Summary

python-utcp is the python implementation of UTCP. Prior to 1.1.3, the utcp-http plugin is vulnerable to a blind Server-Side Request Forgery (SSRF) caused by a trust-boundary inconsistency between manual discovery and tool invocation. register_manual() validates the discovery URL against an HTTPS / loopback allowlist, but call_tool() and call_tool_streaming() reuse the resolved tool_call_template.url directly without revalidating, and the OpenAPI converter blindly trusts whatever servers[0].url an attacker-hosted spec declares. An attacker who hosts a malicious OpenAPI spec on a legitimate HTTPS endpoint can declare e.g. servers: [{ url: "http://127.0.0.1:9090" }] or servers: [{ url: "http://169.254.169.254" }]; the OpenAPI converter then produces tools whose URL points at internal services on the agent host. All three HTTP-class protocols (utcp_http.http, utcp_http.streamable_http, utcp_http.sse) shared the same gap. This vulnerability is fixed in 1.1.3.

Severity

4.7 (Medium)


                        
                          CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-05-15 11:24 UTC

CWE

CWE-918 - Server-Side Request Forgery (SSRF)

Assigner

GitHub_M mitre root Scorecard

References

1 reference

URL	Tags
https://github.com/universal-tool-calling-protoco…	x_refsource_CONFIRM

Impacted products

1 product

Vendor	Product	Version
universal-tool-calling-protocol	python-utcp	Affected: < 1.1.2

Show details on NVD website

JSON

To clipboard

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}

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20 vulnerabilities by universal-tool-calling-protocol

CVE-2026-101061 (GCVE-0-2026-101061)

CVE-2026-101060 (GCVE-0-2026-101060)

CVE-2026-101059 (GCVE-0-2026-101059)

CVE-2026-101058 (GCVE-0-2026-101058)

CVE-2026-101057 (GCVE-0-2026-101057)

CVE-2026-12210 (GCVE-0-2026-12210)

CVE-2026-45366 (GCVE-0-2026-45366)

CVE-2026-45370 (GCVE-0-2026-45370)

CVE-2026-45369 (GCVE-0-2026-45369)

CVE-2026-44661 (GCVE-0-2026-44661)

CVE-2026-101061 (GCVE-0-2026-101061)

CVE-2026-101060 (GCVE-0-2026-101060)

CVE-2026-101059 (GCVE-0-2026-101059)

CVE-2026-101058 (GCVE-0-2026-101058)

CVE-2026-101057 (GCVE-0-2026-101057)

CVE-2026-12210 (GCVE-0-2026-12210)

CVE-2026-45366 (GCVE-0-2026-45366)

CVE-2026-45369 (GCVE-0-2026-45369)

CVE-2026-45370 (GCVE-0-2026-45370)

CVE-2026-44661 (GCVE-0-2026-44661)