{"cve":"CVE-2022-36056","nvd":{"published":"2022-09-14T20:15:09.860","modified":"2026-06-17T04:52:49.517","status":"Modified","description":"Cosign is a project under the sigstore organization which aims to make signatures invisible infrastructure. In versions prior to 1.12.0 a number of vulnerabilities have been found in cosign verify-blob, where Cosign would successfully verify an artifact when verification should have failed. First a cosign bundle can be crafted to successfully verify a blob even if the embedded rekorBundle does not reference the given signature. Second, when providing identity flags, the email and issuer of a certificate is not checked when verifying a Rekor bundle, and the GitHub Actions identity is never checked. Third, providing an invalid Rekor bundle without the experimental flag results in a successful verification. And fourth an invalid transparency log entry will result in immediate success for verification. Details and examples of these issues can be seen in the GHSA-8gw7-4j42-w388 advisory linked. Users are advised to upgrade to 1.12.0. There are no known workarounds for these issues.","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-347"],"references":["https://github.com/sigstore/cosign/commit/80b79ed8b4d28ccbce3d279fd273606b5cddcc25","https://github.com/sigstore/cosign/security/advisories/GHSA-8gw7-4j42-w388","https://github.com/sigstore/cosign/commit/80b79ed8b4d28ccbce3d279fd273606b5cddcc25","https://github.com/sigstore/cosign/security/advisories/GHSA-8gw7-4j42-w388"],"products":["sigstore:cosign"],"source":"nvd","synced_at":"2026-10-19T21:35:14.992143698+00:00"},"epss":{"cve":"CVE-2022-36056","score":0.0015,"percentile":0.04174,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-8gw7-4j42-w388","url":"https://osv.dev/vulnerability/GHSA-8gw7-4j42-w388","summary":"Cosign bundle can be crafted to successfully verify a blob even if the embedded rekorBundle does not reference the given signature","modified":"2024-05-20T21:33:21Z","packages":[{"ecosystem":"Go","name":"github.com/sigstore/cosign","purl":"pkg:golang/github.com/sigstore/cosign","ranges":["<1.12.0"],"fixed":["1.12.0"]}]},{"id":"GO-2022-0998","url":"https://osv.dev/vulnerability/GO-2022-0998","summary":"Improper blob verification in github.com/sigstore/cosign","modified":"2024-05-20T16:03:47Z","packages":[{"ecosystem":"Go","name":"github.com/sigstore/cosign","purl":"pkg:golang/github.com/sigstore/cosign","ranges":["<1.12.0"],"fixed":["1.12.0"]}]}],"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."]}