EUVD-2026-91465

YesWiki before 4.6.7 contains an algorithmic-complexity denial of service in the wakka.php formatter due to an On^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...

CVE-2026-104454

YesWiki versions before 4.6.7 are vulnerable to an algorithmic-complexity denial of service within the wakka.php formatter. The root cause is an O(n^2) markdown-link regular expression that allows unauthenticated attackers to submit a small, specially crafted body of bracket characters to the pag...