PT-2026-41147

Name of the Vulnerable Software and Affected Versions mistune affected versions not specified Description The Image directive plugin fails to properly validate the :width: and :height: options. The validation uses a regular expression that only checks if the value starts with a digit, rather than...

CVE-2026-44898

creationtimestamp| type| source ---|---|--- 2026-05-12 06:07:08+00:00| published-proof-of-concept| https://github.com/lepture/mistune/security/advisories/GHSA-6269-cqxg-mhhv...

OPENSUSE-SU-2026:10761-1 python311-mistune-3.2.1-1.1 on GA media

These are all security issues fixed in the python311-mistune-3.2.1-1.1 package on the GA media of openSUSE Tumbleweed...

Mistune ReDoS in LINK_TITLE_RE allows denial of service with crafted Markdown titles

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GHSA-V87V-83H2-53W7 Mistune Heading ID Attribute has Injection XSS

Summary HTMLRenderer.heading builds the opening tag by string-concatenating the id attribute value directly into the HTML — with no call to escape, safeentity, or any other sanitisation function. A double-quote character " in the id value terminates the attribute, allowing an attacker to inject...

Mistune Heading ID Attribute has Injection XSS

Summary HTMLRenderer.heading builds the opening tag by string-concatenating the id attribute value directly into the HTML — with no call to escape, safeentity, or any other sanitisation function. A double-quote character " in the id value terminates the attribute, allowing an attacker to inject...

GHSA-58CW-G322-P94V Mistune has XSS via unescaped figclass/figwidth in Figure directive

In src/mistune/directives/image.py, the renderfigure function concatenates figclass and figwidth options directly into HTML attributes without escaping lines 152-168. This allows attribute injection and XSS even when HTMLRendererescape=True is used, because these values bypass the inline renderer...

Mistune has XSS via unescaped figclass/figwidth in Figure directive

In src/mistune/directives/image.py, the renderfigure function concatenates figclass and figwidth options directly into HTML attributes without escaping lines 152-168. This allows attribute injection and XSS even when HTMLRendererescape=True is used, because these values bypass the inline renderer...

GHSA-8G87-J6Q8-G93X Mistune Math Plugin has an XSS Escape Bypass

Summary The mistune math plugin renders inline math $...$ and block math $$...$$ by concatenating the raw user-supplied content directly into the HTML output without any HTML escaping. This occurs even when the parser is explicitly created with escape=True, which is supposed to guarantee that all...

Mistune Math Plugin has an XSS Escape Bypass

Summary The mistune math plugin renders inline math $...$ and block math $$...$$ by concatenating the raw user-supplied content directly into the HTML output without any HTML escaping. This occurs even when the parser is explicitly created with escape=True, which is supposed to guarantee that all...

SUSE CVE-2026-33079

In versions 3.0.0a1 through 3.2.0 of Mistune, there is a ReDoS Regular Expression Denial of Service vulnerability in LINKTITLERE that allows an attacker who can supply Markdown for parsing to cause denial of service. The regular expression used for parsing link titles contains overlapping...

PT-2026-39292

Name of the Vulnerable Software and Affected Versions Mistune affected versions not specified Description The math plugin in Mistune fails to sanitize user-supplied content when rendering inline math $...$ and block math $$...$$. The plugin concatenates raw input directly into the HTML output,...

Linux Distros Unpatched Vulnerability : CVE-2026-33079

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - In versions 3.0.0a1 through 3.2.0 of Mistune, there is a ReDoS Regular Expression Denial of Service vulnerability in LINKTITLERE that allows an attacker who can...

CVE-2026-33079

In versions 3.0.0a1 through 3.2.0 of Mistune, there is a ReDoS Regular Expression Denial of Service vulnerability in LINKTITLERE that allows an attacker who can supply Markdown for parsing to cause denial of service. The regular expression used for parsing link titles contains overlapping...

DEBIAN-CVE-2026-33079

In versions 3.0.0a1 through 3.2.0 of Mistune, there is a ReDoS Regular Expression Denial of Service vulnerability in LINKTITLERE that allows an attacker who can supply Markdown for parsing to cause denial of service. The regular expression used for parsing link titles contains overlapping...

UBUNTU-CVE-2026-33079

In versions 3.0.0a1 through 3.2.0 of Mistune, there is a ReDoS Regular Expression Denial of Service vulnerability in LINKTITLERE that allows an attacker who can supply Markdown for parsing to cause denial of service. The regular expression used for parsing link titles contains overlapping...

CVE-2026-33079

In versions 3.0.0a1 through 3.2.0 of Mistune, there is a ReDoS Regular Expression Denial of Service vulnerability in LINKTITLERE that allows an attacker who can supply Markdown for parsing to cause denial of service. The regular expression used for parsing link titles contains overlapping...

CVE-2026-33079

In versions 3.0.0a1 through 3.2.0 of Mistune, there is a ReDoS Regular Expression Denial of Service vulnerability in LINKTITLERE that allows an attacker who can supply Markdown for parsing to cause denial of service. The regular expression used for parsing link titles contains overlapping...

CVE-2026-33079 Mistune ReDoS in LINK_TITLE_RE allows denial of service with crafted Markdown titles

In versions 3.0.0a1 through 3.2.0 of Mistune, there is a ReDoS Regular Expression Denial of Service vulnerability in LINKTITLERE that allows an attacker who can supply Markdown for parsing to cause denial of service. The regular expression used for parsing link titles contains overlapping...

CVE-2026-33079

Mistune 3.0.0a1–3.2.0 contains a ReDoS in LINK_TITLE_RE used for parsing link titles, enabling exponential backtracking when processing Markdown strings with repeated ! sequences and no closing quote. The ambiguity arises from overlapping alternatives in the two branches (double-quoted and single...