Security advisory

{
  "id": "ab1ca0b5e68a14cac166c17ed1fd65872f326dddd39b0d062005a2ea1cc63714",
  "url": "https://osv.dev/vulnerability/CVE-2026-34092",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2026-34092",
    "summary": "Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Wikimedia Foundation MediaWiki. This vulnerability is associated with program files includes/Skin/Skin.Php. This issue affects MediaWiki: from * before 1.43.7, 1.44.4, 1.45.2.",
    "evidence": "osv:CVE-2026-34092",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-34092",
      "aliases": [
        "CVE-2026-34092"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/wikimedia/mediawiki",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "59b795f1b1b2f664b0f9d966b93f8a3347d3d17c"
                },
                {
                  "introduced": "858ee255edbe0da2ff8152df403cac2dba2c9948"
                },
                {
                  "fixed": "d97186dd0b639fe0d4e98e839df52497f2a632a7"
                },
                {
                  "introduced": "99b4a221a98c0ac1531c3f4e31248562833dbc82"
                },
                {
                  "fixed": "1367e89489e17de24356ad6d3c473a649ee3a03b"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:mediawiki:mediawiki:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "1.43.7"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:mediawiki:mediawiki:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "1.44.0"
                      },
                      {
                        "fixed": "1.44.4"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:mediawiki:mediawiki:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "1.45.0"
                      },
                      {
                        "fixed": "1.45.2"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "1.45.1",
            "1.44.3",
            "1.43.6",
            "1.45.0",
            "1.43.5",
            "1.44.2",
            "1.43.4",
            "1.44.0",
            "1.43.3",
            "1.43.2",
            "1.43.1",
            "1.43.0",
            "1.43.0-rc.0",
            "test-hashar-for-ci",
            "1.6.0",
            "1.5.0beta4",
            "1.5.0beta3",
            "1.5.0beta2",
            "1.5.0beta1",
            "1.5.0alpha2",
            "1.5.0alpha1",
            "1.3.0beta1",
            "1.1.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-34092.json"
          }
        }
      ],
      "modified": "2026-10-27T02:30:25.318662375Z",
      "provider": "osv",
      "references": [
        "https://phabricator.wikimedia.org/T384147"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2026-34092",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 460015,
  "published_at": "2026-05-11T16:17:30.663+00:00"
}