{"id":"CVE-2026-5816","aliases":["BIT-gitlab-2026-5816","EUVD-2026-25046","GHSA-gj6x-vqpx-4p3c"],"status":"published","title":"Improper Resolution of Path Equivalence in GitLab","description":"GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.10 before 18.10.4 and 18.11 before 18.11.1 that could have allowed an unauthenticated user to execute arbitrary JavaScript in a user's browser session due to improper path validation under certain conditions.","severity":{"version":"3.1","score":8,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:N","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00407,"percentile":0.35482,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-41"],"published":"2026-04-22T16:04:26Z","modified":"2026-11-11T23:10:00Z","fixes":[{"ecosystem":"Bitnami","package":"gitlab","fixed_in":["18.10.4","18.11.1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Bitnami","package":"gitlab","ranges":[{"type":"SEMVER","events":[{"introduced":"18.10.0"},{"fixed":"18.10.4"},{"introduced":"18.11.0"},{"fixed":"18.11.1"}]}]}],"products":[{"vendor":"gitlab","product":"gitlab"}],"references":[{"url":"https://hackerone.com/reports/3572231","tags":["technical-description","exploit","permissions-required","Permissions Required","web","report"]},{"url":"https://gitlab.com/gitlab-org/gitlab/-/work_items/592816","tags":["Broken Link","web"]},{"url":"https://about.gitlab.com/releases/2026/04/22/patch-release-gitlab-18-11-1-released/","tags":["Release Notes","Vendor Advisory","advisory","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-5816","tags":["web","advisory"]},{"url":"https://about.gitlab.com/releases/2026/04/22/patch-release-gitlab-18-11-1-released"},{"url":"https://github.com/advisories/GHSA-gj6x-vqpx-4p3c"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/5xxx/CVE-2026-5816.json","tags":["advisory"]},{"url":"git://git@gitlab.com:gitlab-org/gitlab.git","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2026-5816","title":"Improper Resolution of Path Equivalence in GitLab","description":"GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.10 before 18.10.4 and 18.11 before 18.11.1 that could have allowed an unauthenticated user to execute 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conditions.","status":"published","published":"2026-04-22T16:04:26Z","modified":"2026-04-23T03:56:09Z","cvss":[{"version":"3.1","score":8,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:N","level":"high"}],"updated_at":"2026-11-02T19:24:19.81608Z"}],"ghsa":[{"id":"GHSA-gj6x-vqpx-4p3c","title":"GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.10 before 18.10.4...","description":"GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.10 before 18.10.4 and 18.11 before 18.11.1 that could have allowed an unauthenticated user to execute arbitrary JavaScript in a user's browser session due to improper path validation under certain conditions.","status":"published","published":"2026-04-22T18:31:47Z","modified":"2026-04-22T18:31:58Z","cvss":[{"version":"3.1","score":8,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:N","level":"high"}],"cwes":["CWE-41"],"updated_at":"2026-11-02T15:07:35.737909Z"}],"nvd":[{"id":"CVE-2026-5816","description":"GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.10 before 18.10.4 and 18.11 before 18.11.1 that could have allowed an unauthenticated user to execute arbitrary JavaScript in a user's browser session due to improper path validation under certain conditions.","status":"published","published":"2026-04-22T17:16:44.763Z","modified":"2026-11-11T23:10:00.263Z","cvss":[{"version":"3.1","score":8,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:N","level":"high","assessor":"secondary"},{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N","level":"high","assessor":"primary"}],"cwes":["CWE-41"],"updated_at":"2026-11-12T01:26:58.520432Z"}],"osv":[{"id":"CVE-2026-5816","title":"Improper Resolution of Path Equivalence in GitLab","description":"GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.10 before 18.10.4 and 18.11 before 18.11.1 that could have allowed an unauthenticated user to execute arbitrary JavaScript in a user's browser session due to improper path validation under certain conditions.","status":"published","published":"2026-04-22T16:04:26.293Z","modified":"2026-10-30T10:30:21.230277934Z","cvss":[{"version":"3.1","score":8,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:N","level":"high"}],"cwes":["CWE-41"],"updated_at":"2026-11-02T15:45:12.016252Z"},{"id":"BIT-gitlab-2026-5816","title":"Improper Resolution of Path Equivalence in GitLab","description":"GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.10 before 18.10.4 and 18.11 before 18.11.1 that could have allowed an unauthenticated user to execute arbitrary JavaScript in a user's browser session due to improper path validation under certain conditions.","status":"published","published":"2026-04-24T09:11:05.21Z","modified":"2026-09-10T16:01:39.299578278Z","updated_at":"2026-11-02T15:28:30.70064Z"}]}}