CVE-2026-108698

MediumCVSS 6.5/10Last modified Oct 16, 2026

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.

Metrics

CVSS 3.1 6.5/10CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:N

Weakness enumeration

CWE-367

Affected software

No affected versions have been published.

Timeline

Published: Oct 11, 2026
Last modified: Oct 16, 2026
NVD status: Deferred

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