{"id":"CVE-2026-84739","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-84739","generatedAt":"2026-10-28T05:26:07.505Z","title":"GitLab has remediated an issue in GitLab CE/EE affecting all versions from 13.11 before 19.2.7, 19.3 before 19.3.3, and 19.4 before 19.4.1 that under certain conditions could have allowed an authenticated user to execute arbitrary JavaScript in the…","description":"GitLab has remediated an issue in GitLab CE/EE affecting all versions from 13.11 before 19.2.7, 19.3 before 19.3.3, and 19.4 before 19.4.1 that under certain conditions could have allowed an authenticated user to execute arbitrary JavaScript in the context of another user's browser session due to improper sanitization of path components in the merge request diff viewer.","published":"2026-09-29T10:17:13.000Z","lastModified":"2026-10-05T17:06:10.000Z","status":"Analyzed","sourceIdentifier":"cve@gitlab.com","cvss":{"version":"3.1","score":8.7,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N"},"cwe":["CWE-79"],"affected":["gitlab/gitlab"],"epss":{"score":0.00343,"percentile":0.27611,"date":"2026-10-27","history":[{"date":"2026-09-29","score":0.00362,"percentile":0.2755}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.34%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[{"kind":"new","label":"New CVE","at":"2026-09-29T10:17:13.000Z","detail":{"score":"8.7","severity":"HIGH","publishedAt":"2026-09-29T10:17:12.820Z"},"summary":"New CVE, high severity (CVSS 8.7)."}],"references":[{"url":"https://docs.gitlab.com/releases/patches/patch-release-gitlab-19-4-1-released/","tags":["Release Notes","Vendor Advisory"],"source":"cve@gitlab.com"},{"url":"https://gitlab.com/gitlab-org/gitlab/-/work_items/627316","tags":["Broken Link"],"source":"cve@gitlab.com"},{"url":"https://hackerone.com/reports/3938482","tags":["Permissions Required"],"source":"cve@gitlab.com"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-84739","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}