Discourse: Prevent webhook payload disclosure on event redelivery

{
  "id": "7360d4e05b29195b44db6c3801c6bca0e51e605efee8b55d8301cace307675b3",
  "url": "https://osv.dev/vulnerability/CVE-2026-47263",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Discourse: Prevent webhook payload disclosure on event redelivery",
    "summary": "Discourse is an open-source discussion platform. From versions 2026.1.0-latest to before 2026.1.4, 2026.3.0-latest to before 2026.3.1, and 2026.4.0-latest to before 2026.4.1, the MessageBus.publish call for /web_hook_events/ in Jobs::RedeliverWebHookEvents did not pass group_ids, leaving the channel readable by any authenticated user (or anonymous user on instances where login_required is disabled). Webhook IDs are sequential integers and trivially enumerable. This issue has been patched in versions 2026.1.4, 2026.3.1, 2026.4.1, and 2026.5.0-latest.1.",
    "evidence": "osv:CVE-2026-47263",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-47263",
      "aliases": [
        "BIT-discourse-2026-47263",
        "CVE-2026-47263",
        "GHSA-wvrm-9v64-m96p"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/discourse/discourse",
              "type": "GIT",
              "events": [
                {
                  "introduced": "322d3c0ac6a8f133b3f82875e9dbbe310f638c1b"
                },
                {
                  "fixed": "ec5d54b3291729ec201615c64d954545000896b9"
                },
                {
                  "introduced": "896e810e1b296478bba91559a8fc89a9926f11fe"
                },
                {
                  "fixed": "211de17ca39dec7bcb6afebdc9c79cebdc0b4495"
                },
                {
                  "introduced": "fdd750d960e603415db62242eca3c30d68e366db"
                },
                {
                  "fixed": "6bb9b59d5d3f5d0c813187a102318e9e4ae49647"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "2026.1.0-latest"
                      },
                      {
                        "fixed": "2026.1.4"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StringRangeExpression"
                  },
                  {
                    "range": [
                      {
                        "introduced": "2026.3.0-latest"
                      },
                      {
                        "fixed": "2026.3.1"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StringRangeExpression"
                  },
                  {
                    "range": [
                      {
                        "introduced": "2026.4.0-latest"
                      },
                      {
                        "fixed": "2026.4.1"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StringRangeExpression"
                  }
                ]
              }
            }
          ],
          "versions": [
            "2026.5.0",
            "v2026.4.0",
            "v2026.1.3",
            "v2026.3.0",
            "v2026.4.0-latest",
            "v2026.1.2",
            "v2026.3.0-latest.1",
            "v2026.1.1",
            "v2026.3.0-latest",
            "v2026.1.0",
            "stable",
            "esr",
            "v2026.1.0-latest"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-47263.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:48.636880703Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/47xxx/CVE-2026-47263.json",
        "https://github.com/discourse/discourse/security/advisories/GHSA-wvrm-9v64-m96p",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-47263"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-200"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/47xxx/CVE-2026-47263.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-47263",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 517012,
  "published_at": "2026-06-12T20:26:19.681+00:00"
}