{"id":"DEBIAN-CVE-2026-54787","details":"sigstore-go is a Go library for Sigstore signing and verification. Prior to 1.2.1, sigstore-go does not check a bundle signing timestamp against the validity window of an ExpiringKey wrapping a self-managed long-lived signing key without a certificate, which can allow an attacker holding expired key material to sign accepted bundles. This issue is fixed in version 1.2.1.","modified":"2026-09-11T18:47:44.007630934Z","published":"2026-07-31T23:17:25.287Z","upstream":["CVE-2026-54787"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2026-54787"}],"affected":[{"package":{"name":"sigstore-go","ecosystem":"Debian:13","purl":"pkg:deb/debian/sigstore-go?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.7.1-2","0.7.3-1","0.7.3-2","1.0.0-1","1.1.4-1","1.2.1-1","1.2.2-1","1.3.0-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-54787.json"}},{"package":{"name":"sigstore-go","ecosystem":"Debian:14","purl":"pkg:deb/debian/sigstore-go?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.2.1-1"}]}],"versions":["0.7.1-2","0.7.3-1","0.7.3-2","1.0.0-1","1.1.4-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-54787.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N"}]}