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.
Metrics
Affected Vendors & Products
References
History
Tue, 13 Oct 2026 18:30:00 +0000
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ssvc
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Tue, 13 Oct 2026 08:15:00 +0000
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Hyper-mcp-rs
Hyper-mcp-rs hyper-mcp |
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| Vendors & Products |
Hyper-mcp-rs
Hyper-mcp-rs hyper-mcp |
Sun, 11 Oct 2026 13:45:00 +0000
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| Description | 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. | |
| Title | hyper-mcp through 0.8.3 OCI Plugin Signature Verification TOCTOU Race Condition | |
| Weaknesses | CWE-367 | |
| References |
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| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: VulnCheck
Published: 2026-10-11T13:25:58.805Z
Updated: 2026-10-13T16:59:55.905Z
Reserved: 2026-10-10T23:08:36.107Z
Link: CVE-2026-108698
Updated: 2026-10-13T15:49:29.776Z
Status : Deferred
Published: 2026-10-11T14:17:04.113
Modified: 2026-10-16T19:18:44.867
Link: CVE-2026-108698
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