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...

UBUNTU-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...

Oracle Linux 9 : python-markdown (ELSA-2026-19366)

The remote Oracle Linux 9 host has a package installed that is affected by a vulnerability as referenced in the ELSA-2026-19366 advisory. 3.3.4-4.2 - Fix CVE-2025-69534 RHEL-153747 Tenable has extracted the preceding description block directly from the Oracle Linux security advisory. Note that...

python-markdown security update

An update is available for python-markdown. This update affects Rocky Linux 10. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is available for each vulnerability from the CVE list Python is an interpreted, interactive, object-oriented programming...

RockyLinux 10 : python-markdown (RLSA-2026:19155)

The remote RockyLinux 10 host has a package installed that is affected by a vulnerability as referenced in the RLSA-2026:19155 advisory. python-markdown: denial of service via malformed HTML-like sequences CVE-2025-69534 Tenable has extracted the preceding description block directly from the...

python-markdown security update

An update is available for python-markdown. This update affects Rocky Linux 9. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is available for each vulnerability from the CVE list Python is an interpreted, interactive, object-oriented programming...

RLSA-2026:19366 Important: python-markdown security update

Python is an interpreted, interactive, object-oriented programming language, which includes modules, classes, exceptions, very high level dynamic data types and dynamic typing. Python supports interfaces to many system calls and libraries, as well as to various windowing systems. Security Fixes:...

RockyLinux 9 : python-markdown (RLSA-2026:19366)

The remote RockyLinux 9 host has a package installed that is affected by a vulnerability as referenced in the RLSA-2026:19366 advisory. python-markdown: denial of service via malformed HTML-like sequences CVE-2025-69534 Tenable has extracted the preceding description block directly from the...

RHEL 9 : python-markdown (RHSA-2026:20674)

The remote Redhat Enterprise Linux 9 host has a package installed that is affected by a vulnerability as referenced in the RHSA-2026:20674 advisory. Python is an interpreted, interactive, object-oriented programming language, which includes modules, classes, exceptions, very high level dynamic da...

DEBIAN-CVE-2026-44708

Mistune is a Python Markdown parser with renderers and plugins. Prior to 3.2.1, 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...

UBUNTU-CVE-2026-44897

Mistune is a Python Markdown parser with renderers and plugins. Prior to 3.2.1, 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...

EUVD-2026-31995

Mistune is a Python Markdown parser with renderers and plugins. 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 format...

CVE-2026-44898

Mistune is a Python Markdown parser with renderers and plugins. 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 format...

CVE-2026-44898 Mistune TOC Anchor Injection XSS

Mistune is a Python Markdown parser with renderers and plugins. 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 format...

CVE-2026-44898

Mistune is a Python Markdown parser with renderers and plugins. 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 format...

EUVD-2026-31993

Mistune is a Python Markdown parser with renderers and plugins. Prior to 3.2.1, 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...

RHSA-2026:20677 Red Hat Security Advisory: python-markdown security update

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RHSA-2026:20676 Red Hat Security Advisory: python-markdown security update

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RHSA-2026:20674 Red Hat Security Advisory: python-markdown security update

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