{"id":"CVE-2026-78252","summary":"Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in GitLab","details":"GitLab has remediated an issue in GitLab CE/EE affecting all versions from 15.3 before 19.1.8, 19.2 before 19.2.6, and 19.3 before 19.3.2 that, under certain conditions, an authenticated user could have induced a targeted user to perform unintended state-changing HTTP requests due to improper sanitization of user-controlled data in the Markdown JSON table renderer.","aliases":["BIT-gitlab-2026-78252"],"modified":"2026-10-31T10:45:24.301528972Z","published":"2026-09-16T06:33:30.825Z","database_specific":{"cwe_ids":["CWE-79"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/78xxx/CVE-2026-78252.json","unresolved_ranges":[{"extracted_events":[{"range":[{"introduced":"15.3"},{"fixed":"19.1.8"},{"introduced":"19.2"},{"fixed":"19.2.6"},{"introduced":"19.3"},{"fixed":"19.3.2"}],"source":"AFFECTED_FIELD","strategy":"StandardRange"}]},{"extracted_events":[{"range":[{"introduced":"15.3"},{"fixed":"19.1.8"},{"introduced":"19.2"},{"fixed":"19.2.6"},{"introduced":"19.3"},{"fixed":"19.3.2"}],"source":"DESCRIPTION"}]}],"cna_assigner":"GitLab"},"references":[{"type":"WEB","url":"https://docs.gitlab.com/releases/patches/patch-release-gitlab-19-3-2-released/"},{"type":"WEB","url":"https://gitlab.com/gitlab-org/gitlab/-/work_items/621447"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/78xxx/CVE-2026-78252.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-78252"},{"type":"REPORT","url":"https://hackerone.com/reports/3917471"},{"type":"PACKAGE","url":"git://git@gitlab.com:gitlab-org/gitlab.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://gitlab.com/gitlab-org/gitlab","events":[{"introduced":"b189ba070558de141d90142340de25bd3edcbefc"},{"fixed":"ec0fce03a55d83fb520d92d1428491e950dd51f4"},{"introduced":"68485a1eb627c9a992f266263157327649822db3"},{"fixed":"684d9581bfefb68c8593331266b69702589d80a3"},{"introduced":"8f83039bebbbb61d3b7b8b7e2342d1deec1e14c6"},{"fixed":"601afd607baae60e14e83e16fb9dea03cf8c7032"}],"database_specific":{"extracted_events":[{"range":[{"introduced":"15.3.0"},{"fixed":"19.1.8"}],"source":"CPE_RANGE","cpe":"cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:*"},{"range":[{"introduced":"15.3.0"},{"fixed":"19.1.8"}],"source":"CPE_RANGE","cpe":"cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:*"},{"cpe":"cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:*","range":[{"introduced":"19.2.0"},{"fixed":"19.2.6"}],"source":"CPE_RANGE"},{"cpe":"cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:*","range":[{"introduced":"19.2.0"},{"fixed":"19.2.6"}],"source":"CPE_RANGE"},{"source":"CPE_RANGE","cpe":"cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:*","range":[{"introduced":"19.3.0"},{"fixed":"19.3.2"}]},{"cpe":"cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:*","range":[{"introduced":"19.3.0"},{"fixed":"19.3.2"}],"source":"CPE_RANGE"}]}}],"versions":["v19.3.0-ee","v19.2.0-ee"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-78252.json"}}],"schema_version":"1.9.2","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:L"}]}