Security advisory

{
  "id": "deab3763daf5f76de57345cfbb305b93c7248273274d5c58c22e552cda7abeae",
  "url": "https://osv.dev/vulnerability/CVE-2026-58031",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2026-58031",
    "summary": "Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Wikimedia Foundation MediaWiki. This vulnerability is associated with program files resources/src/mediawiki.Special.Apisandbox/ApiSandboxLayout.Js. This issue affects MediaWiki: from 1.46.0-rc.0 before 1.46.0.",
    "evidence": "osv:CVE-2026-58031",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-58031",
      "aliases": [
        "CVE-2026-58031"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/wikimedia/mediawiki",
              "type": "GIT",
              "events": [
                {
                  "introduced": "bf51797126d8e923bd9f34e1ba4bc1f3fe0faab2"
                },
                {
                  "fixed": "63da3569472b40c3be833d392b7ce1843a5cbf62"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "1.46.0-rc.0"
                      },
                      {
                        "fixed": "1.46.0"
                      }
                    ],
                    "source": "DESCRIPTION"
                  }
                ]
              }
            }
          ],
          "versions": [
            "1.46.0-rc.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-58031.json"
          }
        }
      ],
      "modified": "2026-10-27T02:30:25.729751011Z",
      "provider": "osv",
      "references": [
        "https://phabricator.wikimedia.org/T426889"
      ],
      "provider_metadata": {
        "unresolved_ranges": [
          {
            "cpes": [
              "cpe:2.3:a:mediawiki:mediawiki:1.46.0:rc0:*:*:*:*:*:*"
            ],
            "vendor_product": "mediawiki:mediawiki",
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "1.46.0-rc0"
                  },
                  {
                    "last_affected": "1.46.0-rc0"
                  }
                ],
                "source": "CPE_STRING"
              }
            ]
          }
        ]
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-58031",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 460016,
  "published_at": "2026-07-01T15:17:11.02+00:00"
}