{"id":"CVE-2026-112212","title":"Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling') in GitLab","summary":"GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.3 before 19.3.6, 19.4 before 19.4.3, and 19.5 before 19.5.1 that, under certain conditions, an unauthenticated user could have poisoned a shared cache's OAuth/…","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:L/A:L","cvssSource":"cna","cwe":["CWE-444"],"vendor":"GitLab","product":"GitLab","affected":["GitLab >= 18.3 < 19.3.6","GitLab >= 19.4 < 19.4.3","GitLab >= 19.5 < 19.5.1"],"published":"2026-10-21","updated":"2026-10-21","sourceUpdated":"2026-10-21T23:33:45.429Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-112212","references":[{"url":"https://gitlab.com/gitlab-org/gitlab/-/work_items/627499"},{"url":"https://docs.gitlab.com/releases/patches/patch-release-gitlab-19-5-1-released/"}],"tags":["cve.org"],"ingestedAt":"2026-10-22T00:21:21.863Z","slug":"CVE-2026-112212","body":"## Overview\n\nGitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.3 before 19.3.6, 19.4 before 19.4.3, and 19.5 before 19.5.1 that, under certain conditions, an unauthenticated user could have poisoned a shared cache's OAuth/OIDC discovery document to redirect certain flows to an externally controlled server, due to improper trust of user-supplied values when constructing endpoint URLs in cached discovery responses.\n\n## Affected\n\n- `GitLab >= 18.3 < 19.3.6`\n- `GitLab >= 19.4 < 19.4.3`\n- `GitLab >= 19.5 < 19.5.1`\n\n## Remediation\n\nUpgrade to versions 19.3.6, 19.4.3, 19.5.1 or above.","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}