CVE-2026-108698 — hyper-mcp through 0.8.3 OCI Plugin Signature Verification TOCTOU Race Condition
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 ra…
Published: 2026-10-11 · CVSS: 8.3 · CVSS 4.0
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7