{"id":"CVE-2025-2256","state":"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.","publishedAt":"2025-09-12T06:06:04.796Z","updatedAt":"2025-09-12T17:19:32.801Z","severity":{"score":7.5,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","source":"GitLab"},"assigner":"GitLab","products":["GitLab GitLab"],"affected":[{"vendor":"GitLab","product":"GitLab","defaultStatus":"unaffected","versions":[{"version":"7.12","status":"affected","lessThan":"18.1.6","versionType":"semver"},{"version":"18.2","status":"affected","lessThan":"18.2.6","versionType":"semver"},{"version":"18.3","status":"affected","lessThan":"18.3.2","versionType":"semver"}],"repo":"git://git@gitlab.com:gitlab-org/gitlab.git","cpes":["cpe:2.3:a:gitlab:gitlab:*:*:*:*:*:*:*:*"]}],"references":["https://about.gitlab.com/releases/2025/09/10/patch-release-gitlab-18-3-2-released/","https://gitlab.com/gitlab-org/gitlab/-/issues/524633","https://hackerone.com/reports/3019485"],"weaknesses":["CWE-1284"],"ingestedAt":"2026-10-29T20:08:55.257Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2025/2xxx/CVE-2025-2256.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2025-2256","state":"PUBLISHED","datePublished":"2025-09-12T06:06:04.796Z","dateUpdated":"2025-09-12T17:19:32.801Z","assignerShortName":"GitLab","assignerOrgId":"ceab7361-8a18-47b1-92ba-4d7d25f6715a","dateReserved":"2025-03-12T15:05:04.877Z"},"containers":{"cna":{"title":"Improper Validation of Specified Quantity in Input in GitLab","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"GitLab","product":"GitLab","defaultStatus":"unaffected","versions":[{"version":"7.12","status":"affected","lessThan":"18.1.6","versionType":"semver"},{"version":"18.2","status":"affected","lessThan":"18.2.6","versionType":"semver"},{"version":"18.3","status":"affected","lessThan":"18.3.2","versionType":"semver"}],"repo":"git://git@gitlab.com:gitlab-org/gitlab.git","cpes":["cpe:2.3:a:gitlab:gitlab:*:*:*:*:*:*:*:*"]}],"references":[{"url":"https://about.gitlab.com/releases/2025/09/10/patch-release-gitlab-18-3-2-released/"},{"url":"https://gitlab.com/gitlab-org/gitlab/-/issues/524633","name":"GitLab Issue #524633","tags":["issue-tracking","permissions-required"]},{"url":"https://hackerone.com/reports/3019485","name":"HackerOne Bug Bounty Report #3019485","tags":["technical-description","exploit","permissions-required"]}],"metrics":[{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-1284","lang":"en","description":"CWE-1284: Improper Validation of Specified Quantity in Input","type":"CWE"}]}],"providerMetadata":{"shortName":"GitLab","orgId":"ceab7361-8a18-47b1-92ba-4d7d25f6715a","dateUpdated":"2025-09-12T06:06:04.796Z"},"solutions":[{"lang":"en","value":"Upgrade to versions 18.1.6, 18.2.6, 18.3.2 or above."}],"credits":[{"lang":"en","value":"Thanks [yuki_osaki](https://hackerone.com/yuki_osaki) and [lambdasawa](https://hackerone.com/lambdasawa) for reporting this vulnerability through our HackerOne bug bounty program","type":"finder"}]},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2025-09-12T17:19:23.671886Z","id":"CVE-2025-2256","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":"2025-09-12T17:19:32.801Z"}}]}}}