CVE-2026-104454

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...

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 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 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 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 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-2025-61637

Improper Neutralization of Input During Web Page Generation XSS or 'Cross-site Scripting' vulnerability in Wikimedia Foundation MediaWiki. This vulnerability is associated with program files resources/src/mediawiki.Action/mediawiki.Action.Edit.Preview.Js, resources/src/mediawiki.Page.Preview.Js...