Security advisory

{
  "id": "3eed01a2dddb0d054413650ad0426ce13e9a36c6c3875670a604bae2259891ec",
  "url": "https://osv.dev/vulnerability/CVE-2024-34502",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2024-34502",
    "summary": "An issue was discovered in WikibaseLexeme in MediaWiki before 1.39.6, 1.40.x before 1.40.2, and 1.41.x before 1.41.1. Loading Special:MergeLexemes will (attempt to) make an edit that merges the from-id to the to-id, even if the request was not a POST request, and even if it does not contain an edit token.",
    "evidence": "osv:CVE-2024-34502",
    "products": [],
    "severity": "critical",
    "structured": {
      "id": "CVE-2024-34502",
      "aliases": [
        "BIT-mediawiki-2024-34502",
        "CVE-2024-34502"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/wikimedia/mediawiki",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "3406e1b7d014d22f2a68237ebf447a88b5ac74ed"
                },
                {
                  "introduced": "468dd69d6ee8e84b9ab26d0ee3d52f215faaf0d4"
                },
                {
                  "fixed": "b886c60c6af24561c805d1d7a2dd6cc0618a53c7"
                },
                {
                  "introduced": "8ce0ec548b747aad503f8689223277dd1c697c7f"
                },
                {
                  "fixed": "36da63d008b7a2f9de929113b99bc7059831cb90"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:mediawiki:mediawiki:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "1.39.6"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:mediawiki:mediawiki:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "1.40.0"
                      },
                      {
                        "fixed": "1.40.2"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "cpe": "cpe:2.3:a:mediawiki:mediawiki:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "1.41.0"
                      },
                      {
                        "fixed": "1.41.1"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "1.41.0",
            "1.40.1",
            "1.39.5",
            "1.40.0",
            "1.39.4",
            "1.39.3",
            "1.39.2",
            "1.39.1",
            "1.39.0",
            "1.39.0-rc.1",
            "1.39.0-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-2024-34502.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:49.774161801Z",
      "provider": "osv",
      "references": [
        "https://gerrit.wikimedia.org/r/c/mediawiki/extensions/WikibaseLexeme/+/1013359",
        "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/FU2FGUXXK6TMV6R52VRECLC6XCSQQISY/",
        "https://phabricator.wikimedia.org/T357101",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/34xxx/CVE-2024-34502.json",
        "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FU2FGUXXK6TMV6R52VRECLC6XCSQQISY/",
        "https://nvd.nist.gov/vuln/detail/CVE-2024-34502"
      ],
      "provider_metadata": {
        "cna_assigner": "mitre",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/34xxx/CVE-2024-34502.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2024-34502",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 518160,
  "published_at": "2024-05-05T00:00:00+00:00"
}