CVE-2026-108699 — hyper-mcp through 0.8.3 Improper Signature Verification of OCI WebAssembly Plugins
hyper-mcp through 0.8.3 contains an improper signature verification vulnerability that allows attackers to load malicious WebAssembly plugins because cosign_verify_args() accept…
Published: 2026-10-11 · CVSS: 8.3 · CVSS 4.0
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7