{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-112212", "assignerOrgId": "ceab7361-8a18-47b1-92ba-4d7d25f6715a", "state": "PUBLISHED", "assignerShortName": "GitLab", "dateReserved": "2026-10-19T10:34:06.433Z", "datePublished": "2026-10-21T23:33:45.429Z", "dateUpdated": "2026-10-21T23:33:45.429Z"}, "containers": {"cna": {"title": "Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling') in GitLab", "descriptions": [{"lang": "en", "value": "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."}], "affected": [{"vendor": "GitLab", "product": "GitLab", "repo": "https://gitlab.com/gitlab-org/gitlab", "cpes": ["cpe:2.3:a:gitlab:gitlab:*:*:*:*:*:*:*:*"], "versions": [{"version": "18.3", "status": "affected", "lessThan": "19.3.6", "versionType": "semver"}, {"version": "19.4", "status": "affected", "lessThan": "19.4.3", "versionType": "semver"}, {"version": "19.5", "status": "affected", "lessThan": "19.5.1", "versionType": "semver"}], "defaultStatus": "unaffected"}], "problemTypes": [{"descriptions": [{"lang": "en", "description": "CWE-444: Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')", "cweId": "CWE-444", "type": "CWE"}]}], "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/"}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:L/A:L", "attackVector": "NETWORK", "attackComplexity": "HIGH", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "CHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "LOW", "availabilityImpact": "LOW", "baseScore": 7.5, "baseSeverity": "HIGH"}}], "solutions": [{"lang": "en", "value": "Upgrade to versions 19.3.6, 19.4.3, 19.5.1 or above."}], "credits": [{"lang": "en", "value": "This vulnerability has been discovered internally by GitLab team member Peter Arts", "type": "finder"}], "providerMetadata": {"orgId": "ceab7361-8a18-47b1-92ba-4d7d25f6715a", "shortName": "GitLab", "dateUpdated": "2026-10-21T23:33:45.429Z"}}}}

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{"affected": [{"affectedData": [{"cpes": ["cpe:2.3:a:gitlab:gitlab:*:*:*:*:*:*:*:*"], "defaultStatus": "unaffected", "product": "GitLab", "repo": "https://gitlab.com/gitlab-org/gitlab", "vendor": "GitLab", "versions": [{"lessThan": "19.3.6", "status": "affected", "version": "18.3", "versionType": "semver"}, {"lessThan": "19.4.3", "status": "affected", "version": "19.4", "versionType": "semver"}, {"lessThan": "19.5.1", "status": "affected", "version": "19.5", "versionType": "semver"}]}], "source": "cve@gitlab.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "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."}], "id": "CVE-2026-112212", "lastModified": "2026-10-22T16:18:19.040", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:L/A:L", "version": "3.1"}, "exploitabilityScore": 1.6, "impactScore": 5.3, "source": "cve@gitlab.com", "type": "Secondary"}]}, "published": "2026-10-22T01:16:57.740", "references": [{"source": "cve@gitlab.com", "url": "https://docs.gitlab.com/releases/patches/patch-release-gitlab-19-5-1-released/"}, {"source": "cve@gitlab.com", "url": "https://gitlab.com/gitlab-org/gitlab/-/work_items/627499"}], "sourceIdentifier": "cve@gitlab.com", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-444"}], "source": "cve@gitlab.com", "type": "Primary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[18.3,19.3.6)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[19.4,19.4.3)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[19.5,19.5.1)"}}], "enrichment": {"confidence": 95.0, "confidence_source": "inferred", "scores": [{"score": 95.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "GitLab", "source": "cna", "vendor": "GitLab"}, "product": "gitlab", "vendor": "gitlab"}], "created": "2026-10-22T02:30:13.981183+00:00", "updated": "2026-10-22T06:00:12.835399+00:00", "vendors": ["gitlab", "gitlab$PRODUCT$gitlab"]}