CVE-2026-112212

{
  "id": "CVE-2026-112212",
  "sourceIdentifier": "[email protected]",
  "published": "2026-10-22T01:16:57.740",
  "lastModified": "2026-10-27T14:08:08.250",
  "vulnStatus": "Analyzed",
  "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."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "GitLab",
          "product": "GitLab",
          "defaultStatus": "unaffected",
          "cpes": [
            "cpe:2.3:a:gitlab:gitlab:*:*:*:*:*:*:*:*"
          ],
          "repo": "https://gitlab.com/gitlab-org/gitlab",
          "versions": [
            {
              "version": "18.3",
              "lessThan": "19.3.6",
              "versionType": "semver",
              "status": "affected"
            },
            {
              "version": "19.4",
              "lessThan": "19.4.3",
              "versionType": "semver",
              "status": "affected"
            },
            {
              "version": "19.5",
              "lessThan": "19.5.1",
              "versionType": "semver",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:L/A:L",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "attackVector": "NETWORK",
          "attackComplexity": "HIGH",
          "privilegesRequired": "NONE",
          "userInteraction": "REQUIRED",
          "scope": "CHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "LOW",
          "availabilityImpact": "LOW"
        },
        "exploitabilityScore": 1.6,
        "impactScore": 5.3
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Primary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-444"
        }
      ]
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "operator": "OR",
          "negate": false,
          "cpeMatch": [
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:*",
              "versionStartIncluding": "18.3.0",
              "versionEndExcluding": "19.3.6",
              "matchCriteriaId": "F4CF8F5F-7493-45B6-A5AD-7DF4C158BCA2"
            },
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:*",
              "versionStartIncluding": "18.3.0",
              "versionEndExcluding": "19.3.6",
              "matchCriteriaId": "88C7148D-0B68-45B0-9BAD-3FDE81DE7016"
            },
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:community:*:*:*",
              "versionStartIncluding": "19.4.0",
              "versionEndExcluding": "19.4.3",
              "matchCriteriaId": "12A85E28-FB9B-477D-BE6F-DE307EFEB4E0"
            },
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:a:gitlab:gitlab:*:*:*:*:enterprise:*:*:*",
              "versionStartIncluding": "19.4.0",
              "versionEndExcluding": "19.4.3",
              "matchCriteriaId": "30C796E1-40AA-41AF-8186-A49F78DC528D"
            },
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:a:gitlab:gitlab:19.5.0:*:*:*:community:*:*:*",
              "matchCriteriaId": "2032C266-304B-4C69-95CA-56904EA5A64F"
            },
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:a:gitlab:gitlab:19.5.0:*:*:*:enterprise:*:*:*",
              "matchCriteriaId": "7D6BE6DD-CA49-4E20-9541-22477632BA5D"
            }
          ]
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://docs.gitlab.com/releases/patches/patch-release-gitlab-19-5-1-released/",
      "source": "[email protected]",
      "tags": [
        "Release Notes",
        "Vendor Advisory"
      ]
    },
    {
      "url": "https://gitlab.com/gitlab-org/gitlab/-/work_items/627499",
      "source": "[email protected]",
      "tags": [
        "Permissions Required"
      ]
    }
  ]
}