Reference page — cumulative record through Monday, October 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
CVE-2026-108699
hyper-mcp-rs hyper-mcp — hyper-mcp through 0.8.3 Improper Signature Verification of OCI WebAssembly Plugins
AV AC AT PR UI VC VI VA CVSS EPSS %ile KEV
N L P N N L H N 8.3 .0013 2.6 —
AFFECTED
Product Versions Fixed
hyper-mcp unspecified —
TIMELINE
Oct 10 Reserved by VulnCheck
Oct 11 Published (CNA: VulnCheck)
Oct 13 EXPLOIT PUBLISHED — CVE-2026-108699 (hyper-mcp-rs hyper-mcp). Public exploit reference added.
Description
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.
Lifecycle
Complete event history — 3 events, chronological
| Date | Event | Detail |
|---|
| October 10, 2026 | Reserved | Reserved by VulnCheck |
| October 11, 2026 | Published | Published (CNA: VulnCheck) |
| October 13, 2026 | EXPLOIT PUBLISHED | EXPLOIT PUBLISHED — CVE-2026-108699 (hyper-mcp-rs hyper-mcp). Public exploit reference added. |
Affected
Affected products and packages — 1 row
| Vendor | Product / Package | Ecosystem | Version introduced | Fixed |
|---|
| hyper-mcp-rs | hyper-mcp | — | — | — |
About this page
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-108699 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Monday, October 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.
