{"id":"CVE-2025-12983","summary":"Memory Allocation with Excessive Size Value in GitLab","details":"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.","aliases":["BIT-gitlab-2025-12983"],"modified":"2026-04-10T05:21:07.393828Z","published":"2025-11-15T08:13:32.098Z","related":["CGA-h77h-5xhx-c4qp"],"database_specific":{"cwe_ids":["CWE-789"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/12xxx/CVE-2025-12983.json","cna_assigner":"GitLab"},"references":[{"type":"WEB","url":"https://about.gitlab.com/releases/2025/11/12/patch-release-gitlab-18-5-2-released/"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/12xxx/CVE-2025-12983.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-12983"},{"type":"REPORT","url":"https://gitlab.com/gitlab-org/gitlab/-/issues/296257"},{"type":"REPORT","url":"https://hackerone.com/reports/3419588"},{"type":"PACKAGE","url":"git://git@gitlab.com:gitlab-org/gitlab.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://gitlab.com/gitlab-org/gitlab","events":[{"introduced":"76326ae8b898b38c8217ad037ed7122be00e62f0"},{"fixed":"424c6d1f82a9a32df34d8059f2dadc30d356ff65"}],"database_specific":{"versions":[{"introduced":"16.9"},{"fixed":"18.3.6"}]}},{"type":"GIT","repo":"https://gitlab.com/gitlab-org/gitlab","events":[{"introduced":"9255f56b45844196bb7657a9f1fde6aa65a5d08d"},{"fixed":"e2798305dc3604e272e12a319a932e96c3540374"}],"database_specific":{"versions":[{"introduced":"18.4"},{"fixed":"18.4.4"}]}},{"type":"GIT","repo":"https://gitlab.com/gitlab-org/gitlab","events":[{"introduced":"37cc4da7158316bb9b204cef9b056f16fff1df32"},{"fixed":"cb961538ba8e451246e168e7bbd5b1e04f69102a"}],"database_specific":{"versions":[{"introduced":"18.5"},{"fixed":"18.5.2"}]}}],"versions":["v18.4.0-ee","v18.5.0-ee"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-12983.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:L"}]}