{"id":"CVE-2025-2256","aliases":["BIT-gitlab-2025-2256","EUVD-2025-29019","GHSA-m8q6-f6pj-j3mh"],"status":"published","title":"Improper Validation of Specified Quantity in Input in GitLab","description":"An issue has been discovered in GitLab CE/EE affecting all versions from 7.12 before 18.1.6, 18.2 before 18.2.6, and 18.3 before 18.3.2 that could have allowed unauthorized users to render the GitLab instance unresponsive to legitimate users by sending multiple concurrent large SAML responses.","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.0055,"percentile":0.46499,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-1284"],"published":"2025-09-12T06:06:04Z","modified":"2026-10-30T10:47:12Z","fixes":[{"ecosystem":"Bitnami","package":"gitlab","fixed_in":["18.1.6","18.2.6","18.3.2"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Bitnami","package":"gitlab","ranges":[{"type":"SEMVER","events":[{"introduced":"7.12.0"},{"fixed":"18.1.6"},{"introduced":"18.2.0"},{"fixed":"18.2.6"},{"introduced":"18.3.0"},{"fixed":"18.3.2"}]}]}],"products":[{"vendor":"gitlab","product":"gitlab"}],"references":[{"url":"https://about.gitlab.com/releases/2025/09/10/patch-release-gitlab-18-3-2-released/","tags":["Release Notes","Vendor Advisory","advisory","web"]},{"url":"https://gitlab.com/gitlab-org/gitlab/-/issues/524633","tags":["issue-tracking","permissions-required","Broken Link","web","report"]},{"url":"https://hackerone.com/reports/3019485","tags":["technical-description","exploit","permissions-required","Permissions Required","web","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-2256","tags":["web","advisory"]},{"url":"https://about.gitlab.com/releases/2025/09/10/patch-release-gitlab-18-3-2-released"},{"url":"https://github.com/advisories/GHSA-m8q6-f6pj-j3mh"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/2xxx/CVE-2025-2256.json","tags":["advisory"]},{"url":"git://git@gitlab.com:gitlab-org/gitlab.git","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2025-2256","title":"Improper Validation of Specified Quantity in Input in GitLab","description":"An issue has been discovered in GitLab CE/EE affecting all versions from 7.12 before 18.1.6, 18.2 before 18.2.6, and 18.3 before 18.3.2 that could have allowed unauthorized users to render the GitLab instance unresponsive to legitimate users by sending multiple concurrent large SAML responses.","status":"published","published":"2025-09-12T06:06:04.796Z","modified":"2025-09-12T17:19:32.801Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-1284"],"updated_at":"2026-11-02T14:32:39.039362Z"}],"euvd":[{"id":"EUVD-2025-29019","description":"An issue has been discovered in GitLab CE/EE affecting all versions from 7.12 before 18.1.6, 18.2 before 18.2.6, and 18.3 before 18.3.2 that could have allowed unauthorized users to render the GitLab instance unresponsive to legitimate users by sending multiple concurrent large SAML responses.","status":"published","published":"2025-09-12T06:06:04Z","modified":"2025-09-12T17:19:32Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T20:31:44.034664Z"}],"ghsa":[{"id":"GHSA-m8q6-f6pj-j3mh","title":"An issue has been discovered in GitLab CE/EE affecting all versions from 7.12 before 18.1.6, 18.2...","description":"An issue has been discovered in GitLab CE/EE affecting all versions from 7.12 before 18.1.6, 18.2 before 18.2.6, and 18.3 before 18.3.2 that could have allowed unauthorized users to render the GitLab instance unresponsive to legitimate users by sending multiple concurrent large SAML responses.","status":"published","published":"2025-09-12T06:30:26Z","modified":"2025-09-12T06:30:26Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-1284"],"updated_at":"2026-11-02T15:03:34.910007Z"}],"nvd":[{"id":"CVE-2025-2256","description":"An issue has been discovered in GitLab CE/EE affecting all versions from 7.12 before 18.1.6, 18.2 before 18.2.6, and 18.3 before 18.3.2 that could have allowed unauthorized users to render the GitLab instance unresponsive to legitimate users by sending multiple concurrent large SAML responses.","status":"published","published":"2025-09-12T06:15:42.34Z","modified":"2026-10-19T17:10:00.173Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-1284"],"updated_at":"2026-11-02T14:11:28.834562Z"}],"osv":[{"id":"CVE-2025-2256","title":"Improper Validation of Specified Quantity in Input in GitLab","description":"An issue has been discovered in GitLab CE/EE affecting all versions from 7.12 before 18.1.6, 18.2 before 18.2.6, and 18.3 before 18.3.2 that could have allowed unauthorized users to render the GitLab instance unresponsive to legitimate users by sending multiple concurrent large SAML responses.","status":"published","published":"2025-09-12T06:06:04.796Z","modified":"2026-10-30T10:47:12.026090325Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-1284"],"updated_at":"2026-11-02T15:44:47.009967Z"},{"id":"BIT-gitlab-2025-2256","title":"Improper Validation of Specified Quantity in Input in GitLab","description":"An issue has been discovered in GitLab CE/EE affecting all versions from 7.12 before 18.1.6, 18.2 before 18.2.6, and 18.3 before 18.3.2 that could have allowed unauthorized users to render the GitLab instance unresponsive to legitimate users by sending multiple concurrent large SAML responses.","status":"published","published":"2025-09-16T09:07:42.625Z","modified":"2026-09-08T08:47:45.179342882Z","updated_at":"2026-11-02T15:28:30.70064Z"}]}}