Linuxfoundation Sigstore Timestamp Authority — known CVE vulnerabilities

Every CVE whose affected-product data names Linuxfoundation Sigstore Timestamp Authority, ordered by CVSS severity, with EPSS exploit prediction and CISA KEV status.

CVEs (2)

• CVE-2025-66564 — CVSS 7.5 (high): Sigstore Timestamp Authority is a service for issuing RFC 3161 timestamps. Prior to 2.0.3, Function api.ParseJSONRequest currently splits…
• CVE-2026-39984 — CVSS 5.5 (medium): Sigstore Timestamp Authority is a service for issuing RFC 3161 timestamps. Versions 2.0.5 and below contain an authorization bypass…