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4 vulnerabilities by hyper-mcp-rs
CVE-2026-108699 (GCVE-0-2026-108699)
Vulnerability from nvd – Published: 2026-10-11 13:25 – Updated: 2026-10-11 13:25
VLAI
EPSS
VEX
Title
hyper-mcp through 0.8.3 Improper Signature Verification of OCI WebAssembly Plugins
Summary
hyper-mcp through 0.8.3 contains an improper signature verification vulnerability that allows attackers to load malicious WebAssembly plugins because cosign_verify_args() accepts any signer identity and OIDC issuer by default. Attackers controlling a plugin image reference can sign a malicious image with a free Sigstore keyless certificate to execute plugins with configured host, filesystem, and environment capabilities.
Severity
CWE
- CWE-347 - Improper Verification of Cryptographic Signature
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://hackmd.io/@1ExmmukzRMWN7B4gQ4W-4Q/hyper-m… | third-party-advisory |
| https://github.com/hyper-mcp-rs/hyper-mcp/blob/v0… | technical-description |
| https://github.com/hyper-mcp-rs/hyper-mcp/blob/v0… | technical-description |
| https://github.com/hyper-mcp-rs/hyper-mcp | product |
| https://www.vulncheck.com/advisories/hyper-mcp-th… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| hyper-mcp-rs | hyper-mcp |
Affected:
0 , ≤ 0.8.3
(semver)
|
Date Public
2026-10-11 00:00
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}
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CVE-2026-108698 (GCVE-0-2026-108698)
Vulnerability from nvd – Published: 2026-10-11 13:25 – Updated: 2026-10-11 13:25
VLAI
EPSS
VEX
Title
hyper-mcp through 0.8.3 OCI Plugin Signature Verification TOCTOU Race Condition
Summary
hyper-mcp through 0.8.3 contains a signature verification bypass vulnerability in load_wasm in src/wasm/oci.rs that verifies the Cosign signature of a separately resolved tag rather than the loaded manifest. Attackers controlling registry responses for the tag can serve an unsigned malicious manifest to the loader and a signed one to Cosign, executing unsigned WebAssembly plugins with configured host capabilities.
Severity
CWE
- CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://hackmd.io/@1ExmmukzRMWN7B4gQ4W-4Q/hyper-m… | third-party-advisory |
| https://github.com/hyper-mcp-rs/hyper-mcp/blob/v0… | technical-description |
| https://github.com/hyper-mcp-rs/hyper-mcp/blob/v0… | technical-description |
| https://github.com/hyper-mcp-rs/hyper-mcp | product |
| https://www.vulncheck.com/advisories/hyper-mcp-th… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| hyper-mcp-rs | hyper-mcp |
Affected:
0 , ≤ 0.8.3
(semver)
|
Date Public
2026-10-11 00:00
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]
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}
],
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CVE-2026-108699 (GCVE-0-2026-108699)
Vulnerability from cvelistv5 – Published: 2026-10-11 13:25 – Updated: 2026-10-11 13:25
VLAI
EPSS
VEX
Title
hyper-mcp through 0.8.3 Improper Signature Verification of OCI WebAssembly Plugins
Summary
hyper-mcp through 0.8.3 contains an improper signature verification vulnerability that allows attackers to load malicious WebAssembly plugins because cosign_verify_args() accepts any signer identity and OIDC issuer by default. Attackers controlling a plugin image reference can sign a malicious image with a free Sigstore keyless certificate to execute plugins with configured host, filesystem, and environment capabilities.
Severity
CWE
- CWE-347 - Improper Verification of Cryptographic Signature
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://hackmd.io/@1ExmmukzRMWN7B4gQ4W-4Q/hyper-m… | third-party-advisory |
| https://github.com/hyper-mcp-rs/hyper-mcp/blob/v0… | technical-description |
| https://github.com/hyper-mcp-rs/hyper-mcp/blob/v0… | technical-description |
| https://github.com/hyper-mcp-rs/hyper-mcp | product |
| https://www.vulncheck.com/advisories/hyper-mcp-th… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| hyper-mcp-rs | hyper-mcp |
Affected:
0 , ≤ 0.8.3
(semver)
|
Date Public
2026-10-11 00:00
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CVE-2026-108698 (GCVE-0-2026-108698)
Vulnerability from cvelistv5 – Published: 2026-10-11 13:25 – Updated: 2026-10-11 13:25
VLAI
EPSS
VEX
Title
hyper-mcp through 0.8.3 OCI Plugin Signature Verification TOCTOU Race Condition
Summary
hyper-mcp through 0.8.3 contains a signature verification bypass vulnerability in load_wasm in src/wasm/oci.rs that verifies the Cosign signature of a separately resolved tag rather than the loaded manifest. Attackers controlling registry responses for the tag can serve an unsigned malicious manifest to the loader and a signed one to Cosign, executing unsigned WebAssembly plugins with configured host capabilities.
Severity
CWE
- CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://hackmd.io/@1ExmmukzRMWN7B4gQ4W-4Q/hyper-m… | third-party-advisory |
| https://github.com/hyper-mcp-rs/hyper-mcp/blob/v0… | technical-description |
| https://github.com/hyper-mcp-rs/hyper-mcp/blob/v0… | technical-description |
| https://github.com/hyper-mcp-rs/hyper-mcp | product |
| https://www.vulncheck.com/advisories/hyper-mcp-th… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| hyper-mcp-rs | hyper-mcp |
Affected:
0 , ≤ 0.8.3
(semver)
|
Date Public
2026-10-11 00:00
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"dateUpdated": "2026-10-11T13:25:58.805Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}