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 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.
CVE-2026-108698
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-108698
hyper-mcp
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://github.com/hyper-mcp-rs/hyper-mcp",
"vendor": "hyper-mcp-rs",
"product": "hyper-mcp",
"versions": [
{
"status": "affected",
"version": "0",
"versionType": "semver",
"lessThanOrEqual": "0.8.3"
}
],
"packageURL": "pkg:cargo/hyper-mcp",
"defaultStatus": "unaffected"
}
]- Related CVEs
- CVE-2026-108698
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #20453 · Revision 1
- Added to Heist Feed
- Publisher date