MGASA-2026-0254 Updated python-mistune package fixes security vulnerabilities

The updated python-mistune package fixes two security vulnerablities: Prior to 3.2.1, rendertocul builds a table-of-contents tree from a list of level, id, text tuples. Both the id value used as href="" and the text value used as the visible link label are inserted into tags via a plain Python...

Mistune: Potential DoS via quadratic-time parsing in parse_link_text

Summary Mistune is vulnerable to a CPU exhaustion DoS due to superlinear approximately On² behavior in parselinktext. A relatively small input consisting of repeated characters causes significant parsing slowdown. Affected component mistune/inlineparser.py → parselinktext Description When parsing...

OPENSUSE-SU-2026:21191-1 Security update for python-mistune

This update for python-mistune fixes the following issue - CVE-2026-49851: potential DoS via quadratic-time parsing in parselinktext bsc1269091...

Mistune: Potential DoS via quadratic-time parsing in parse_link_text

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CVE-2026-49851

Mistune is a Python Markdown parser with renderers and plugins. Prior to 3.3.0, Mistune is vulnerable to a CPU exhaustion DoS due to superlinear approximately On² behavior in parselinktext. When parsing Markdown containing many consecutive characters, parselinktext repeatedly scans the input usin...

PT-2026-52033

Name of the Vulnerable Software and Affected Versions Mistune versions prior to 3.3.0 Description A CPU exhaustion Denial of Service DoS occurs due to superlinear approximately On² behavior in the parse link text function. When processing Markdown containing numerous consecutive characters, the...