{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "4.6.7"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "DESCRIPTION"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "07120ed8971047f504f7ec78060828f1895f475f"
            }
          ],
          "repo": "https://github.com/yeswiki/yeswiki",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-gf57-wg5m-h34q"
  ],
  "database_specific": {
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
      "CWE-1333"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/104xxx/CVE-2026-104454.json"
  },
  "details": "YesWiki before 4.6.7 contains an algorithmic-complexity denial of service in the wakka.php formatter due to an O(n^2) markdown-link regex. Unauthenticated attackers can submit a small crafted body of bracket characters to the page-edit preview endpoint to pin PHP-FPM workers and saturate the pool.",
  "id": "CVE-2026-104454",
  "modified": "2026-10-04T02:31:00.214350808Z",
  "published": "2026-10-02T11:38:25.069Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/104xxx/CVE-2026-104454.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/YesWiki/yeswiki/security/advisories/GHSA-gf57-wg5m-h34q"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-104454"
    },
    {
      "type": "ADVISORY",
      "url": "https://www.vulncheck.com/advisories/yeswiki-before-4.6.7-redos-via-wakka-php-edit-preview-endpoint"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "YesWiki before 4.6.7 ReDoS via wakka.php Edit-Preview Endpoint"
}