{"id":"CVE-2026-112212","aliases":["BIT-gitlab-2026-112212","EUVD-2026-107671","GHSA-f887-chxw-8674"],"status":"published","title":"Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling') in GitLab","description":"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/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.","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:L/A:L","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.0019,"percentile":0.08758,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-444"],"published":"2026-10-21T23:33:45Z","modified":"2026-11-04T23:10:00Z","fixes":[{"ecosystem":"Bitnami","package":"gitlab","fixed_in":["19.3.6","19.4.3","19.5.1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Bitnami","package":"gitlab","ranges":[{"type":"SEMVER","events":[{"introduced":"18.3.0"},{"fixed":"19.3.6"},{"introduced":"19.4.0"},{"fixed":"19.4.3"},{"introduced":"19.5.0"},{"fixed":"19.5.1"}]}]}],"products":[{"vendor":"gitlab","product":"gitlab"}],"references":[{"url":"https://gitlab.com/gitlab-org/gitlab/-/work_items/627499","tags":["Permissions Required","web"]},{"url":"https://docs.gitlab.com/releases/patches/patch-release-gitlab-19-5-1-released/","tags":["Release Notes","Vendor Advisory","advisory","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-112212","tags":["web","advisory"]},{"url":"https://docs.gitlab.com/releases/patches/patch-release-gitlab-19-5-1-released"},{"url":"https://github.com/advisories/GHSA-f887-chxw-8674"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/112xxx/CVE-2026-112212.json","tags":["advisory"]},{"url":"https://gitlab.com/gitlab-org/gitlab","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2026-112212","title":"Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling') in GitLab","description":"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/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.","status":"published","published":"2026-10-21T23:33:45.429Z","modified":"2026-10-30T17:33:45.464Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:L/A:L","level":"high","assessor":"cna"}],"cwes":["CWE-444"],"updated_at":"2026-11-02T13:44:40.64332Z"}],"euvd":[{"id":"EUVD-2026-107671","description":"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/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.","status":"published","published":"2026-10-21T23:33:45Z","modified":"2026-10-30T17:33:45Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:L/A:L","level":"high"}],"updated_at":"2026-11-02T16:59:03.071815Z"}],"ghsa":[{"id":"GHSA-f887-chxw-8674","title":"GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.3 before 19.3.6, 19...","description":"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/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.","status":"published","published":"2026-10-22T03:33:33Z","modified":"2026-10-22T03:33:42Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:L/A:L","level":"high"}],"cwes":["CWE-444"],"updated_at":"2026-11-02T15:14:14.973906Z"}],"nvd":[{"id":"CVE-2026-112212","description":"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/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.","status":"published","published":"2026-10-22T01:16:57.74Z","modified":"2026-11-04T23:10:00.223Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:L/A:L","level":"high","assessor":"secondary"}],"cwes":["CWE-444"],"updated_at":"2026-11-05T01:45:12.506753Z"}],"osv":[{"id":"CVE-2026-112212","title":"Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling') in GitLab","description":"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/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.","status":"published","published":"2026-10-21T23:33:45.429Z","modified":"2026-11-05T21:16:20.293253869Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:L/A:L","level":"high"}],"cwes":["CWE-444"],"updated_at":"2026-11-05T22:00:58.054534Z"},{"id":"BIT-gitlab-2026-112212","title":"Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling') in GitLab","description":"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/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.","status":"published","published":"2026-10-29T09:10:15.443Z","modified":"2026-10-29T10:45:05.850642186Z","updated_at":"2026-11-02T15:28:30.70064Z"}]}}