CVE-2026-12910

{"id": "CVE-2026-12910", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-12910", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-09-20T00:35:51.187199Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "cve@gitlab.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.4, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N", "integrityImpact": "LOW", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "LOW", "confidentialityImpact": "LOW"}, "impactScore": 2.5, "exploitabilityScore": 2.8}]}, "affected": [{"source": "cve@gitlab.com", "affectedData": [{"cpes": ["cpe:2.3:a:gitlab:gitlab:*:*:*:*:*:*:*:*"], "repo": "git://git@gitlab.com:gitlab-org/gitlab.git", "vendor": "GitLab", "product": "GitLab", "versions": [{"status": "affected", "version": "18.6", "lessThan": "19.1.8", "versionType": "semver"}, {"status": "affected", "version": "19.2", "lessThan": "19.2.6", "versionType": "semver"}, {"status": "affected", "version": "19.3", "lessThan": "19.3.2", "versionType": "semver"}], "defaultStatus": "unaffected"}]}], "published": "2026-09-15T18:17:16.000", "references": [{"url": "https://gitlab.com/gitlab-org/gitlab/-/work_items/603742", "tags": ["Broken Link"], "source": "cve@gitlab.com"}, {"url": "https://hackerone.com/reports/3745561", "tags": ["Permissions Required"], "source": "cve@gitlab.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "cve@gitlab.com", "description": [{"lang": "en", "value": "CWE-306"}]}], "descriptions": [{"lang": "en", "value": "GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.6 before 19.1.8, 19.2 before 19.2.6, and 19.3 before 19.3.2 that under certain conditions could have allowed an authenticated user to bypass SAML SSO sign-in restrictions and authenticate without SSO due to missing authentication enforcement checks."}], "lastModified": "2026-09-28T20:04:41.633", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:*", "vulnerable": true, "matchCriteriaId": "392EC0FE-84E2-461C-848B-5E4385906807", "versionEndExcluding": "19.1.8", "versionStartIncluding": "18.6.0"}, {"criteria": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:*", "vulnerable": true, "matchCriteriaId": "FE213215-FBC7-4115-A827-CEE82FEE91BF", "versionEndExcluding": "19.1.8", "versionStartIncluding": "18.6.0"}, {"criteria": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:*", "vulnerable": true, "matchCriteriaId": "4A6AAECA-E557-43EF-B109-B92D1281E48B", "versionEndExcluding": "19.2.6", "versionStartIncluding": "19.2.0"}, {"criteria": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:*", "vulnerable": true, "matchCriteriaId": "8598AF82-D212-4B5D-ABC3-C12C9B217BF3", "versionEndExcluding": "19.2.6", "versionStartIncluding": "19.2.0"}, {"criteria": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:*", "vulnerable": true, "matchCriteriaId": "198FF0EF-1A45-484F-9268-F7821E006BA8", "versionEndExcluding": "19.3.2", "versionStartIncluding": "19.3.0"}, {"criteria": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:*", "vulnerable": true, "matchCriteriaId": "03B1901F-AAF4-421E-B704-5345CB840DEF", "versionEndExcluding": "19.3.2", "versionStartIncluding": "19.3.0"}], "operator": "OR"}]}], "sourceIdentifier": "cve@gitlab.com"}