{"action":"Upgrade github.com/sigstore/fulcio to 1.8.3 or later.","affected":[{"fixed":"1.8.3","introduced":"0"}],"component":"github.com/sigstore/fulcio","cve_ids":["CVE-2025-66506"],"ecosystem":"Go","epss":0.00211,"exploited":false,"fixed_versions":["1.8.3"],"ghsa_id":"GHSA-f83f-xpx7-ffpw","id":"tcs_01M5KGC6XWCHT1XNKKTKHBASHN","modified_at":"2026-02-04T03:55:44.700916Z","published_at":"2025-12-08T21:31:36Z","references":["https://osv.dev/vulnerability/GO-2025-4193","https://github.com/sigstore/fulcio/security/advisories/GHSA-f83f-xpx7-ffpw","https://nvd.nist.gov/vuln/detail/CVE-2025-66506","https://github.com/sigstore/fulcio/commit/765a0e57608b9ef390e1eeeea8595b9054c63a5a"],"severity":{"label":"high","score":7.5},"sources":[{"source":"osv","source_id":"GO-2025-4193","url":"https://osv.dev/vulnerability/GO-2025-4193"},{"source":"nvd","source_id":"CVE-2025-66506","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-66506"}],"summary":"Fulcio allocates excessive memory during token parsing in github.com/sigstore/fulcio"}