CVE-2026-59922

A flaw was found in Mistune, a Python Markdown parser. A remote attacker could exploit this vulnerability by providing specially crafted input containing specific marker pairs tilde, equals-sign, or caret. This crafted input causes the parser to perform quadratic work, leading to excessive CPU...

SUSE CVE-2026-59922

Mistune is a Python Markdown parser with renderers and plugins. Prior to 3.3.0, a run of closed tilde, equals-sign, or caret marker pairs around a character causes quadratic work in src/mistune/plugins/formatting.py when the strikethrough, mark, or insert plugin scans for matching markers from ea...

PT-2026-56508

Name of the Vulnerable Software and Affected Versions Mistune versions prior to 3.3.0 Description A flaw in the Python Markdown parser occurs when the strikethrough, mark, or insert plugins scan for matching markers from each possible start position. Specifically, a sequence of closed tilde,...