{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "2026.1.0-latest"
              },
              {
                "fixed": "2026.1.3"
              },
              {
                "introduced": "2026.2.0-latest"
              },
              {
                "fixed": "2026.2.2"
              },
              {
                "introduced": "2026.3.0-latest"
              },
              {
                "fixed": "2026.3.0"
              }
            ],
            "source": "AFFECTED_FIELD"
          },
          "events": [
            {
              "introduced": "322d3c0ac6a8f133b3f82875e9dbbe310f638c1b"
            },
            {
              "fixed": "b3f024ce9587e678216892cbd967201b2450e197"
            },
            {
              "introduced": "f7cec86997edc21d6074ceb7666f7e2e6e1b1fdf"
            },
            {
              "fixed": "4431801e7b5af883edb430643fdace7608ffb6fb"
            },
            {
              "introduced": "896e810e1b296478bba91559a8fc89a9926f11fe"
            },
            {
              "fixed": "896e810e1b296478bba91559a8fc89a9926f11fe"
            }
          ],
          "repo": "https://github.com/discourse/discourse",
          "type": "GIT"
        }
      ],
      "versions": [
        "2026.3.0"
      ]
    }
  ],
  "aliases": [
    "GHSA-6c9x-3vrp-682x"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-200"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/27xxx/CVE-2026-27481.json"
  },
  "details": "Discourse is an open-source discussion platform. From versions 2026.1.0-latest to before 2026.1.3, 2026.2.0-latest to before 2026.2.2, and 2026.3.0-latest to before 2026.3.0, an authorization bypass vulnerability allows unauthenticated or unauthorized users to view hidden (staff-only) tags and its associated data. All Discourse instances with tagging enabled and staff-only tag groups configured are impacted. This issue has been patched in versions 2026.1.3, 2026.2.2, and 2026.3.0.",
  "id": "CVE-2026-27481",
  "modified": "2026-07-27T03:56:38.481379344Z",
  "published": "2026-04-03T21:27:12.156Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/27xxx/CVE-2026-27481.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/discourse/discourse/security/advisories/GHSA-6c9x-3vrp-682x"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-27481"
    }
  ],
  "schema_version": "1.8.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Discourse: Hidden tag visibility bypass on tag routes"
}