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The root and all issuing certificates are assumed to be valid during the leaf certificate's validity. There is no impact to users of the public Sigstore infrastructure. This may affect private deployments with customized PKIs. 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There is no impact to users of the public Sigstore infrastructure. This may affect private deployments with customized PKIs. This issue has been fixed in version 3.0.5.","state":0,"publishedAt":null,"modifiedAt":null,"affected":[],"metrics":[{"system":"EUVD CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N","score":3.7,"severity":null}],"references":["https://github.com/sigstore/cosign/security/advisories/GHSA-wfqv-66vq-46rm","https://github.com/sigstore/cosign/commit/3c9a7363f563db76d78e2de2cabd945450f3781e","https://github.com/sigstore/cosign/releases/tag/v3.0.5"],"sourceUrl":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-8430","license":"ENISA EUVD · source terms and attribution apply","enrichment":{"sourceStatus":null,"weaknesses":[],"productCriteria":[],"sourceDates":{"datePublished":"Feb 19, 2026, 10:27:08 PM","dateUpdated":"Feb 20, 2026, 3:41:03 PM"},"relatedAdvisories":[{"id":"openSUSE-SU-2026:11676-1","title":"trivy-0.74.0-2.1 on GA media","vulnerabilityIds":["CVE-2026-24122","CVE-2026-37236","CVE-2026-41178","CVE-2026-50163"]},{"id":"SUSE-SU-2026:20904-1","title":"Security update for cosign","vulnerabilityIds":["CVE-2025-11065","CVE-2025-58181","CVE-2026-22703","CVE-2026-22772","CVE-2026-23991","CVE-2026-23992","CVE-2026-24122","CVE-2026-24137","CVE-2026-26958"]},{"id":"SUSE-SU-2026:0777-1","title":"Security update for cosign","vulnerabilityIds":["CVE-2025-11065","CVE-2025-58181","CVE-2026-22703","CVE-2026-22772","CVE-2026-23991","CVE-2026-23992","CVE-2026-24122","CVE-2026-24137","CVE-2026-26958"]},{"id":"openSUSE-SU-2026:10635-1","title":"hauler-1.4.2-1.1 on GA media","vulnerabilityIds":["CVE-2026-24122"]},{"id":"openSUSE-SU-2026:20386-1","title":"Security update for cosign","vulnerabilityIds":["CVE-2025-11065","CVE-2025-58181","CVE-2026-22703","CVE-2026-22772","CVE-2026-23991","CVE-2026-23992","CVE-2026-24122","CVE-2026-24137","CVE-2026-26958"]},{"id":"openSUSE-SU-2026:10235-1","title":"cosign-3.0.5-1.1 on GA media","vulnerabilityIds":["CVE-2026-22772","CVE-2026-23991","CVE-2026-23992","CVE-2026-24122","CVE-2026-24137","CVE-2026-26958"]},{"id":"openSUSE-SU-2026:21801-1","title":"Security update for trivy","vulnerabilityIds":["CVE-2026-24122","CVE-2026-37236","CVE-2026-41178","CVE-2026-50163","CVE-2026-56854","CVE-2026-56855","CVE-2026-78662","CVE-2026-84303","CVE-2026-84304","CVE-2026-84445"]},{"id":"openSUSE-SU-2026:20662-1","title":"Security update for hauler","vulnerabilityIds":["CVE-2026-24122"]}],"note":"EUVD source date text has no stated timezone and is retained without inventing a UTC instant. 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In versions 3.0.4 and below, an issuing certificate with a validity that expires before the leaf certificate will be considered valid during verification even if the provided timestamp would mean the issuing certificate should be considered expired. When verifying artifact signatures using a certificate, Cosign first verifies the certificate chain using the leaf certificate's \"not before\" timestamp and later checks expiry of the leaf certificate using either a signed timestamp provided by the Rekor transparency log or from a timestamp authority, or using the current time. The root and all issuing certificates are assumed to be valid during the leaf certificate's validity. There is no impact to users of the public Sigstore infrastructure. This may affect private deployments with customized PKIs. This issue has been fixed in version 3.0.5.","state":0,"publishedAt":"2026-02-19T23:16:24.517+00:00","modifiedAt":"2026-06-17T10:22:39.833+00:00","affected":[],"metrics":[{"system":"CVSS 3.1 · security-advisories@github.com · Secondary","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N","score":3.7,"severity":"LOW"}],"references":["https://github.com/sigstore/cosign/commit/3c9a7363f563db76d78e2de2cabd945450f3781e","https://github.com/sigstore/cosign/releases/tag/v3.0.5","https://github.com/sigstore/cosign/security/advisories/GHSA-wfqv-66vq-46rm"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-24122","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Analyzed","weaknesses":["CWE-295"],"productCriteria":["cpe:2.3:a:sigstore:cosign:*:*:*:*:*:*:*:*"],"sourceDates":{"published":"2026-02-19T23:16:24.517","lastModified":"2026-06-17T10:22:39.833"},"relatedAdvisories":[],"note":"NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON."},"key":"nvd:CVE-2026-24122","identifiers":["CVE-2026-24122"]},"retained":false,"historicalAffected":[]},{"revision":"f0c201264deb44ebbf19611e969927c1","observedAt":"2026-10-24T13:19:41.952+00:00","statement":{"source":"osv","id":"GHSA-wfqv-66vq-46rm","aliases":["BIT-cosign-2026-24122","CVE-2026-24122","GO-2026-4529"],"title":"Cosign considered signatures valid with expired intermediate certificates when transparency log verification is skipped","description":"## Summary\n\nWhen verifying artifact signatures using a certificate, Cosign first verifies the certificate chain using the leaf certificate's \"not before\" timestamp and later checks expiry of the leaf certificate using either a signed timestamp provided by the Rekor transparency log or from a timestamp authority, or using the current time. The root and all issuing certificates are assumed to be valid during the leaf certificate's validity. An issuing certificate with a validity that expires before the leaf certificate will be considered valid during verification even if the provided timestamp would mean the issuing certificate should be considered expired.\n\n## Impact\n\nNo impact to users of the public Sigstore infrastructure. This may affect private deployments with customized PKIs. In practice, this is unlikely to occur as CAs should not be issuing certificates that outlive the validity of the CA and its parents.\n\n## Workarounds\n\nUpgrade to the latest release, or verify the certificate chain out of band.\n\n## Example to Reproduce\n\n* Root CA certificate is valid from 12pm-2pm\n* Intermediate CA certificate is valid from 12:30pm-1:30pm\n* Leaf certificate is valid from 1pm-3pm - **Note that this is unlikely to happen in practice**, as a CA shouldn't issue a certificate that would be valid after the issuing CA certificate expires\n* Signature generated at 2:30pm with a signed timestamp\n* During verification, the leaf certificate's not before time (1pm) is used to verify the chain - 1pm is in the validity windows for the root and intermediate CA certificates\n* The timestamp's time is checked to be in the validity window of only the leaf certificate - 2:30pm is in the validity window for the leaf\n* Even though the root and intermediate would be expired at 2:30pm, verification succeeds","state":0,"publishedAt":"2026-02-19T22:09:12+00:00","modifiedAt":"2026-09-10T03:50:36.127642+00:00","affected":[{"ecosystem":"Go","name":"github.com/sigstore/cosign","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"fixed","version":"3.0.5"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V3","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N","score":null,"severity":null},{"system":"Publisher rating","vector":null,"score":null,"severity":"LOW"}],"references":["https://github.com/sigstore/cosign/security/advisories/GHSA-wfqv-66vq-46rm","https://nvd.nist.gov/vuln/detail/CVE-2026-24122","https://github.com/sigstore/cosign/commit/3c9a7363f563db76d78e2de2cabd945450f3781e","https://github.com/sigstore/cosign","https://github.com/sigstore/cosign/releases/tag/v3.0.5"],"sourceUrl":"https://github.com/advisories/GHSA-wfqv-66vq-46rm","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-wfqv-66vq-46rm","identifiers":["GHSA-wfqv-66vq-46rm","BIT-cosign-2026-24122","CVE-2026-24122","GO-2026-4529"]},"retained":false,"historicalAffected":[]},{"revision":"60d0491ec7714ca4b9bacd2460556452","observedAt":"2026-10-24T13:19:41.952+00:00","statement":{"source":"osv","id":"GO-2026-4529","aliases":["BIT-cosign-2026-24122","CVE-2026-24122","GHSA-wfqv-66vq-46rm"],"title":"Cosign considered signatures valid with expired intermediate certificates when transparency log verification is skipped in github.com/sigstore/cosign","description":"Cosign considered signatures valid with expired intermediate certificates when transparency log verification is skipped in github.com/sigstore/cosign","state":0,"publishedAt":"2026-02-23T18:23:15+00:00","modifiedAt":"2026-06-16T16:44:28.6157041+00:00","affected":[{"ecosystem":"Go","name":"github.com/sigstore/cosign","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"}]}],"versions":[],"rawVersionEvidence":null},{"ecosystem":"Go","name":"github.com/sigstore/cosign/v2","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"}]}],"versions":[],"rawVersionEvidence":null},{"ecosystem":"Go","name":"github.com/sigstore/cosign/v3","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"fixed","version":"3.0.5"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[],"references":["https://github.com/sigstore/cosign/security/advisories/GHSA-wfqv-66vq-46rm","https://nvd.nist.gov/vuln/detail/CVE-2026-24122","https://github.com/sigstore/cosign/commit/3c9a7363f563db76d78e2de2cabd945450f3781e","https://github.com/sigstore/cosign/releases/tag/v3.0.5"],"sourceUrl":"https://osv.dev/vulnerability/GO-2026-4529","license":"OSV · upstream source license applies","key":"osv:GO-2026-4529","identifiers":["GO-2026-4529","BIT-cosign-2026-24122","CVE-2026-24122","GHSA-wfqv-66vq-46rm"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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