{
    "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"
            }
        }
    }
}