Linuxfoundation Fulcio vulnerabilities

2 CVEs affecting Linuxfoundation Fulcio, 0 known to be exploited (CISA KEV), with EPSS scores. Latest: CVE-2026-22772, published 2026-01-12.

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• CVE-2026-22772, published 2026-01-12. Medium severity, CVSS 5.3. EPSS: 0.2% chance of exploitation in the next 30 days. Fulcio is a certificate authority for issuing code signing certificates for an OpenID Connect (OIDC) identity. Prior to 1.8.5, Fulcio's metaRegex() function uses unanchored regex, allowing attackers…
• CVE-2025-66506, published 2025-12-04. High severity, CVSS 7.5. EPSS: 0.2% chance of exploitation in the next 30 days. Fulcio is a free-to-use certificate authority for issuing code signing certificates for an OpenID Connect (OIDC) identity. Prior to 1.8.3, function identity.extractIssuerURL splits (via a call to…