{"cve":"CVE-2026-22703","nvd":{"published":"2026-01-10T07:16:03.030","modified":"2026-06-17T10:20:15.880","status":"Analyzed","description":"Cosign provides code signing and transparency for containers and binaries. Prior to versions 2.6.2 and 3.0.4, Cosign bundle can be crafted to successfully verify an artifact even if the embedded Rekor entry does not reference the artifact's digest, signature or public key. When verifying a Rekor entry, Cosign verifies the Rekor entry signature, and also compares the artifact's digest, the user's public key from either a Fulcio certificate or provided by the user, and the artifact signature to the Rekor entry contents. Without these comparisons, Cosign would accept any response from Rekor as valid. A malicious actor that has compromised a user's identity or signing key could construct a valid Cosign bundle by including any arbitrary Rekor entry, thus preventing the user from being able to audit the signing event. This issue has been patched in versions 2.6.2 and 3.0.4.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N","score":5.5},"cwes":["CWE-345"],"references":["https://github.com/sigstore/cosign/commit/6832fba4928c1ad69400235bbc41212de5006176","https://github.com/sigstore/cosign/pull/4623","https://github.com/sigstore/cosign/security/advisories/GHSA-whqx-f9j3-ch6m"],"products":["sigstore:cosign"],"source":"nvd","synced_at":"2026-10-19T22:19:41.481987139+00:00"},"epss":{"cve":"CVE-2026-22703","score":0.00106,"percentile":0.01103,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-whqx-f9j3-ch6m","url":"https://osv.dev/vulnerability/GHSA-whqx-f9j3-ch6m","summary":"Cosign verification accepts any valid Rekor entry under certain conditions","modified":"2026-09-10T03:50:33.665491515Z","packages":[{"ecosystem":"Go","name":"github.com/sigstore/cosign/v3","purl":"pkg:golang/github.com/sigstore/cosign/v3","ranges":["<3.0.4"],"fixed":["3.0.4"]},{"ecosystem":"Go","name":"github.com/sigstore/cosign/v2","purl":"pkg:golang/github.com/sigstore/cosign/v2","ranges":["<2.6.2"],"fixed":["2.6.2"]}]},{"id":"GO-2026-4309","url":"https://osv.dev/vulnerability/GO-2026-4309","summary":"Cosign verification accepts any valid Rekor entry under certain conditions in github.com/sigstore/cosign","modified":"2026-08-24T10:25:51.746398338Z","packages":[{"ecosystem":"Go","name":"github.com/sigstore/cosign","purl":"pkg:golang/github.com/sigstore/cosign","ranges":["all versions"],"fixed":[]},{"ecosystem":"Go","name":"github.com/sigstore/cosign/v2","purl":"pkg:golang/github.com/sigstore/cosign/v2","ranges":["<2.6.2"],"fixed":["2.6.2"]},{"ecosystem":"Go","name":"github.com/sigstore/cosign/v3","purl":"pkg:golang/github.com/sigstore/cosign/v3","ranges":["<3.0.4"],"fixed":["3.0.4"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}