{"id":"CVE-2025-12983","aliases":["BIT-gitlab-2025-12983","EUVD-2025-197698","GHSA-9mv9-gw4x-7xw4","UBUNTU-CVE-2025-12983"],"status":"published","title":"Memory Allocation with Excessive Size Value in GitLab","description":"GitLab has remediated an issue in GitLab CE/EE affecting all versions from 16.9 before 18.3.6, 18.4 before 18.4.4, and 18.5 before 18.5.2 that could have allowed an authenticated attacker to cause a denial of service condition by submitting specially crafted markdown content with nested formatting patterns.","severity":{"version":"3.1","score":3.5,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:L","level":"low","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00449,"percentile":0.39489,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-789"],"published":"2025-11-15T08:13:32Z","modified":"2026-10-30T10:47:04Z","fixes":[{"ecosystem":"Bitnami","package":"gitlab","fixed_in":["18.3.6","18.4.4","18.5.2"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Bitnami","package":"gitlab","ranges":[{"type":"SEMVER","events":[{"introduced":"16.9.0"},{"fixed":"18.3.6"},{"introduced":"18.4.0"},{"fixed":"18.4.4"},{"introduced":"18.5.0"},{"fixed":"18.5.2"}]}]},{"source":"osv","ecosystem":"Ubuntu:16.04:LTS","package":"gitlab","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["8.4.3+dfsg-9","8.4.3+dfsg-12","8.5.8+dfsg-5"]}],"products":[{"vendor":"gitlab","product":"gitlab"}],"references":[{"url":"https://about.gitlab.com/releases/2025/11/12/patch-release-gitlab-18-5-2-released/","tags":["Release Notes","Vendor Advisory","advisory","web","report"]},{"url":"https://gitlab.com/gitlab-org/gitlab/-/issues/296257","tags":["issue-tracking","permissions-required","Broken Link","web","report"]},{"url":"https://hackerone.com/reports/3419588","tags":["technical-description","exploit","permissions-required","Permissions Required","web","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-12983","tags":["web","advisory"]},{"url":"https://about.gitlab.com/releases/2025/11/12/patch-release-gitlab-18-5-2-released"},{"url":"https://github.com/advisories/GHSA-9mv9-gw4x-7xw4"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/12xxx/CVE-2025-12983.json","tags":["advisory"]},{"url":"git://git@gitlab.com:gitlab-org/gitlab.git","tags":["package"]},{"url":"https://ubuntu.com/security/CVE-2025-12983","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2025-12983","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2025-12983","title":"Memory Allocation with Excessive 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patterns.","status":"published","published":"2025-11-15T08:13:32Z","modified":"2025-11-17T20:17:39Z","cvss":[{"version":"3.1","score":3.5,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:L","level":"low"}],"updated_at":"2026-11-02T19:49:16.200687Z"}],"ghsa":[{"id":"GHSA-9mv9-gw4x-7xw4","title":"GitLab has remediated an issue in GitLab CE/EE affecting all versions from 16.9 before 18.3.6, 18...","description":"GitLab has remediated an issue in GitLab CE/EE affecting all versions from 16.9 before 18.3.6, 18.4 before 18.4.4, and 18.5 before 18.5.2 that could have allowed an authenticated attacker to cause a denial of service condition by submitting specially crafted markdown content with nested formatting patterns.","status":"published","published":"2025-11-15T09:30:25Z","modified":"2025-11-15T09:30:31Z","cvss":[{"version":"3.1","score":3.5,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:L","level":"low"}],"cwes":["CWE-789"],"updated_at":"2026-11-02T15:04:49.684595Z"}],"nvd":[{"id":"CVE-2025-12983","description":"GitLab has remediated an issue in GitLab CE/EE affecting all versions from 16.9 before 18.3.6, 18.4 before 18.4.4, and 18.5 before 18.5.2 that could have allowed an authenticated attacker to cause a denial of service condition by submitting specially crafted markdown content with nested formatting 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patterns.","status":"published","published":"2025-11-15T08:13:32.098Z","modified":"2026-10-30T10:47:04.797255255Z","cvss":[{"version":"3.1","score":3.5,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:L","level":"low"}],"cwes":["CWE-789"],"updated_at":"2026-11-02T15:44:46.024537Z"},{"id":"UBUNTU-CVE-2025-12983","description":"GitLab has remediated an issue in GitLab CE/EE affecting all versions from 16.9 before 18.3.6, 18.4 before 18.4.4, and 18.5 before 18.5.2 that could have allowed an authenticated attacker to cause a denial of service condition by submitting specially crafted markdown content with nested formatting patterns.","status":"published","published":"2025-11-15T09:15:00Z","modified":"2025-11-24T05:15:37Z","cvss":[{"version":"3.1","score":3.5,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:L","level":"low"},{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T16:55:20.144818Z"},{"id":"BIT-gitlab-2025-12983","title":"Memory Allocation with Excessive Size Value in GitLab","description":"GitLab has remediated an issue in GitLab CE/EE affecting all versions from 16.9 before 18.3.6, 18.4 before 18.4.4, and 18.5 before 18.5.2 that could have allowed an authenticated attacker to cause a denial of service condition by submitting specially crafted markdown content with nested formatting patterns.","status":"published","published":"2025-11-20T09:03:27.972Z","modified":"2026-09-08T08:47:44.203715753Z","updated_at":"2026-11-02T15:28:30.70064Z"}]}}