CVE-2026-104454 — YesWiki before 4.6.7 ReDoS via wakka.php Edit-Preview Endpoint
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…
Published: 2026-10-02 · CVSS: 6.9 · CVSS 4.0
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7