Answer in brief
CVE-2026-108698 records a High severity (CVSS 8.3) vulnerability in hyper-mcp through 0.8.3 OCI Plugin Signature Verification TOCTOU Race Condition. The current sources do not mark it as known exploited. The current feed maps hyper-mcp-rs/hyper-mcp (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 8.3. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps hyper-mcp-rs/hyper-mcp (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| hyper-mcp-rs/hyper-mcpgeneric | >=0 <=0.8.3 | Not reported |
Published upstream
Oct 11, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 11, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Oct 11, 2026
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.
Quoted source text, attributed separately from HOL analysis.