Vulnerability-Lookup

ALSA-2026:71543

Vulnerability from osv_almalinux – Published: 2026-09-24 00:00 – Updated: 2026-09-26 14:59 – Source website

Summary

Important: cockpit-image-builder security update

Details

The image-builder-frontend generates custom images suitable for deploying systems or uploading to the cloud. It integrates into Cockpit as a frontend for osbuild.

Security Fix(es):

fast-uri: fast-uri: Server-Side Request Forgery via repeated hostname percent-decoding (CVE-2026-75899)
fast-uri: fast-uri: Server-side request forgery via malformed IPv6 normalization (CVE-2026-75975)
fast-uri: fast-uri: URI parsing flaw enables server-side request forgery and redirects (CVE-2026-76172)
fast-uri: fast-uri: Authority Injection via Unvalidated Port Serialization (CVE-2026-84292)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

References

URL

Type

	https://access.redhat.com/errata/RHSA-2026:71543	ADVISORY
	https://access.redhat.com/security/cve/CVE-2026-75899	REPORT
	https://access.redhat.com/security/cve/CVE-2026-75975	REPORT
	https://access.redhat.com/security/cve/CVE-2026-76172	REPORT
	https://access.redhat.com/security/cve/CVE-2026-84292	REPORT
	https://bugzilla.redhat.com/2521778	REPORT
	https://bugzilla.redhat.com/2521779	REPORT
	https://bugzilla.redhat.com/2521798	REPORT
	https://bugzilla.redhat.com/2527747	REPORT
	https://errata.almalinux.org/10/ALSA-2026-71543.html	ADVISORY

JSON

To clipboard

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    {
      "package": {
        "ecosystem": "AlmaLinux:10",
        "name": "cockpit-image-builder"
      },
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        {
          "events": [
            {
              "introduced": "0"
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            {
              "fixed": "94.4-1.el10_2"
            }
          ],
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        }
      ]
    }
  ],
  "details": "The image-builder-frontend generates custom images suitable for deploying systems or uploading to the cloud. It integrates into Cockpit as a frontend for osbuild.  \n\nSecurity Fix(es):  \n\n  * fast-uri: fast-uri: Server-Side Request Forgery via repeated hostname percent-decoding (CVE-2026-75899)\n  * fast-uri: fast-uri: Server-side request forgery via malformed IPv6 normalization (CVE-2026-75975)\n  * fast-uri: fast-uri: URI parsing flaw enables server-side request forgery and redirects (CVE-2026-76172)\n  * fast-uri: fast-uri: Authority Injection via Unvalidated Port Serialization (CVE-2026-84292)\n\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.\n",
  "id": "ALSA-2026:71543",
  "modified": "2026-09-26T14:59:10Z",
  "published": "2026-09-24T00:00:00Z",
  "references": [
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      "type": "ADVISORY",
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    },
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    {
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      "url": "https://access.redhat.com/security/cve/CVE-2026-76172"
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      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-84292"
    },
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    },
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    },
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  ],
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  ],
  "summary": "Important: cockpit-image-builder security update"
}

CVE-2026-75899 (GCVE-0-2026-75899)

Vulnerability from cvelistv5 – Published: 2026-08-24 09:40 – Updated: 2026-08-24 16:19

Title

fast-uri vulnerable to server-side request forgery via repeated hostname percent-decoding

Summary

fast-uri is a URI parser for Node.js. It decodes percent escapes in a hostname during parsing and then decodes the parsed hostname a second time during authority recomposition, so a single call to normalize or resolve can turn nested percent-encoded input into a different network destination such as a loopback hostname or address. For example, a doubly encoded host that spells out a loopback name decodes to that live host in one operation, which contradicts RFC 3986 section 2.4 that an implementation must not decode the same string more than once. An application that normalizes or resolves an untrusted HTTP-family URI before outbound routing, redirect validation, or a host-policy check can receive a destination different from the one the original encoded host represented, giving a server-side request forgery and host-policy bypass primitive. This is an incomplete-fix variant of CVE-2026-6322. The affected versions are 2.4.1 up to but not including 2.4.5, 3.1.2 up to but not including 3.1.6, and 4.0.0 up to but not including 4.1.3. The issue is fixed in 2.4.5, 3.1.6, and 4.1.3, which normalize percent escapes once and preserve encoded percent signs. Users should upgrade to a patched version.

Severity

7.5 (High)


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

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-24 16:16 UTC

CWE

CWE-174 - Double Decoding of the Same Data
CWE-918 - Server-Side Request Forgery (SSRF)

Assigner

openjs redhat root Scorecard

References

2 references

URL	Tags
https://github.com/fastify/fast-uri/security/advi…
https://cna.openjsf.org/security-advisories.html

Impacted products

1 product

Vendor	Product	Version
fast-uri	fast-uri	Affected: 2.4.1 , < 2.4.5 (semver) Unaffected: 2.4.5 (semver) Affected: 3.1.2 , < 3.1.6 (semver) Unaffected: 3.1.6 (semver) Affected: 4.0.0 , < 4.1.3 (semver) Unaffected: 4.1.3 (semver)

Credits

mcollina UlisesGascon NotAFlightRisk

Show details on NVD website

JSON

To clipboard

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CVE-2026-75975 (GCVE-0-2026-75975)

Vulnerability from cvelistv5 – Published: 2026-08-24 09:58 – Updated: 2026-08-24 14:30

Title

fast-uri vulnerable to server-side request forgery via malformed IPv6 normalization

Summary

fast-uri is a URI parser for Node.js. Its custom parser for bracketed IPv6 literals does not validate the complete IPv6 grammar, so invalid trailing text in an authority can be silently discarded and a malformed attacker-controlled host is turned into a different valid IPv6 destination. For example, a bracketed literal with invalid trailing characters is normalized to the unspecified address, which a Node HTTP client then connects to a local service over loopback, and other malformed literals collapse to private-range addresses. No error is set on the parsed result, so an application checking the error field cannot detect the rewrite. An application that normalizes untrusted URLs before outbound requests, redirects, proxy routing, or address-policy enforcement can be redirected to a local or private IPv6 target, giving a server-side request forgery and address-policy bypass primitive. The affected versions are 2.3.1 up to but not including 2.4.5, 3.0.0 up to but not including 3.1.6, and 4.0.0 up to but not including 4.1.3. The issue is fixed in 2.4.5, 3.1.6, and 4.1.3, which validate bracketed IP literals against the full grammar and mark malformed literals as authority errors. Users should upgrade to a patched version.

Severity

7.5 (High)


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

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-24 14:29 UTC

CWE

CWE-20 - Improper Input Validation
CWE-918 - Server-Side Request Forgery (SSRF)

Assigner

openjs redhat root Scorecard

References

2 references

URL	Tags
https://github.com/fastify/fast-uri/security/advi…
https://cna.openjsf.org/security-advisories.html

Impacted products

1 product

Vendor	Product	Version
fast-uri	fast-uri	Affected: 2.3.1 , < 2.4.5 (semver) Unaffected: 2.4.5 (semver) Affected: 3.0.0 , < 3.1.6 (semver) Unaffected: 3.1.6 (semver) Affected: 4.0.0 , < 4.1.3 (semver) Unaffected: 4.1.3 (semver)

Credits

mcollina UlisesGascon

Show details on NVD website

JSON

To clipboard

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CVE-2026-76172 (GCVE-0-2026-76172)

Vulnerability from cvelistv5 – Published: 2026-08-24 10:07 – Updated: 2026-08-24 14:29

Title

fast-uri vulnerable to host confusion via percent-encoded scheme normalization

Summary

fast-uri is a URI parser for Node.js. During parsing it runs a legacy decoding pass over the scheme component and never re-escapes the result, and serialization writes the scheme back out verbatim, unlike the host component which is re-escaped. As a result an input whose scheme carries percent-encoded slashes parses as a scheme with no authority, so the parsed host and error are both undefined, yet resolving or normalizing that same input emits a network-path reference whose authority is attacker-chosen and re-parses to that host. An application that allowlists on the parsed host, or treats a reference with no authority as safe to resolve against its base, gets the opposite of what it checked, giving an off-site redirect, server-side request forgery, or address-policy bypass. The legacy decoder also expands non-standard escape forms, widening the issue past upstream filters, and control characters in the scheme can reach the output as raw carriage return and line feed. The affected versions are 2.3.1 up to but not including 2.4.5, 3.0.0 up to but not including 3.1.6, and 4.0.0 up to but not including 4.1.3. The issue is fixed in 2.4.5, 3.1.6, and 4.1.3, which reject a scheme that is not valid after decoding. Users should upgrade to a patched version.

Severity

7.5 (High)


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

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-24 14:29 UTC

CWE

CWE-177 - Improper Handling of URL Encoding (Hex Encoding)

Assigner

openjs redhat root Scorecard

References

2 references

URL	Tags
https://github.com/fastify/fast-uri/security/advi…
https://cna.openjsf.org/security-advisories.html

Impacted products

1 product

Vendor	Product	Version
fast-uri	fast-uri	Affected: 2.3.1 , < 2.4.5 (semver) Unaffected: 2.4.5 (semver) Affected: 3.0.0 , < 3.1.6 (semver) Unaffected: 3.1.6 (semver) Affected: 4.0.0 , < 4.1.3 (semver) Unaffected: 4.1.3 (semver)

Credits

YashvantHange mcollina UlisesGascon

Show details on NVD website

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CVE-2026-84292 (GCVE-0-2026-84292)

Vulnerability from cvelistv5 – Published: 2026-09-02 20:09 – Updated: 2026-09-03 13:16

Title

fast-uri vulnerable to authority injection via an unvalidated port in serialize

Summary

fast-uri serializes the port component of a URI without validating it. When recomposing the authority, the userinfo and host components are escaped but the port is concatenated verbatim, so a port value that is not a sequence of digits can inject authority delimiters, demoting the intended host to userinfo and pointing the authority at an attacker-controlled host. Both fast-uri and Node's URL read the result back as the attacker's host with no error, so re-validating the built URI does not catch it. This affects applications that build URIs from parts and assign untrusted data to the port component through the serialize, normalize, or equal functions in their object forms. The issue affects fast-uri versions before 2.4.6, from 3.0.0 before 3.1.7, and from 4.0.0 before 4.1.4. It is fixed in 2.4.6, 3.1.7, and 4.1.4, where recomposeAuthority rejects any port that is not a digit sequence per RFC 3986.

Severity

7.5 (High)


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

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-09-03 13:16 UTC

CWE

CWE-116 - Improper Encoding or Escaping of Output

Assigner

openjs redhat root Scorecard

References

2 references

URL	Tags
https://github.com/fastify/fast-uri/security/advi…
https://cna.openjsf.org/security-advisories.html

Impacted products

1 product

Vendor	Product	Version
fast-uri	fast-uri	Affected: 0 , < 2.4.6 (semver) Unaffected: 2.4.6 (semver) Affected: 3.0.0 , < 3.1.7 (semver) Unaffected: 3.1.7 (semver) Affected: 4.0.0 , < 4.1.4 (semver) Unaffected: 4.1.4 (semver)

Credits

YashvantHange mcollina UlisesGascon

Show details on NVD website

JSON

To clipboard

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Sightings

Author	Source	Type	Date	Other

Nomenclature

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Confirmed: The vulnerability has been validated from an analyst's perspective.
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Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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