{"id":"CVE-2026-24408","state":"PUBLISHED","title":"sigstore has CSRF possibility in OIDC authentication during signing","description":"sigstore-python is a Python tool for generating and verifying Sigstore signatures. Prior to version 4.2.0, the sigstore-python OAuth authentication flow is susceptible to Cross-Site Request Forgery. `_OAuthSession` creates a unique \"state\" and sends it as a parameter in the authentication request but the \"state\" in the server response seems not not be cross-checked with this value. Version 4.2.0 contains a patch for the issue.","publishedAt":"2026-01-26T22:21:35.047Z","updatedAt":"2026-01-27T21:35:14.119Z","severity":{"score":0,"label":"None","version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:N","source":"GitHub_M"},"assigner":"GitHub_M","products":["sigstore sigstore-python"],"affected":[{"vendor":"sigstore","product":"sigstore-python","versions":[{"version":"< 4.2.0","status":"affected"}]}],"references":["https://github.com/sigstore/sigstore-python/security/advisories/GHSA-hm8f-75xx-w2vr","https://github.com/sigstore/sigstore-python/commit/5e77497fe8f0b202bdd118949074ec2f20da69aa","https://github.com/sigstore/sigstore-python/releases/tag/v4.2.0"],"weaknesses":["CWE-352"],"ingestedAt":"2026-10-29T20:11:21.040Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/24xxx/CVE-2026-24408.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-24408","state":"PUBLISHED","datePublished":"2026-01-26T22:21:35.047Z","dateUpdated":"2026-01-27T21:35:14.119Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-01-22T18:19:49.174Z"},"containers":{"cna":{"title":"sigstore has CSRF possibility in OIDC authentication during signing","descriptions":[{"lang":"en","value":"sigstore-python is a Python tool for generating and verifying Sigstore signatures. Prior to version 4.2.0, the sigstore-python OAuth authentication flow is susceptible to Cross-Site Request Forgery. `_OAuthSession` creates a unique \"state\" and sends it as a parameter in the authentication request but the \"state\" in the server response seems not not be cross-checked with this value. Version 4.2.0 contains a patch for the issue."}],"affected":[{"vendor":"sigstore","product":"sigstore-python","versions":[{"version":"< 4.2.0","status":"affected"}]}],"references":[{"url":"https://github.com/sigstore/sigstore-python/security/advisories/GHSA-hm8f-75xx-w2vr","name":"https://github.com/sigstore/sigstore-python/security/advisories/GHSA-hm8f-75xx-w2vr","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/sigstore/sigstore-python/commit/5e77497fe8f0b202bdd118949074ec2f20da69aa","name":"https://github.com/sigstore/sigstore-python/commit/5e77497fe8f0b202bdd118949074ec2f20da69aa","tags":["x_refsource_MISC"]},{"url":"https://github.com/sigstore/sigstore-python/releases/tag/v4.2.0","name":"https://github.com/sigstore/sigstore-python/releases/tag/v4.2.0","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":0,"baseSeverity":"NONE","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:N","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-352","lang":"en","description":"CWE-352: Cross-Site Request Forgery (CSRF)","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-01-26T22:21:35.047Z"},"source":{"advisory":"GHSA-hm8f-75xx-w2vr","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-01-27T21:35:04.864095Z","id":"CVE-2026-24408","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-01-27T21:35:14.119Z"}}]}}}