CVE-2026-59926

Mistune is a Python Markdown parser with renderers and plugins. Prior to 3.2.1, renderadmonition in src/mistune/directives/admonition.py concatenates the Admonition directive :class: option into the HTML class attribute without escaping, allowing attribute injection and cross-site scripting even...

CVE-2026-59923

Mistune is a Python Markdown parser with renderers and plugins. Prior to 3.3.0, HTMLRenderer.safeurl does not block percent-encoded javascript URIs, allowing attacker-supplied Markdown links or images to bypass URL protections and execute script in rendered HTML. This issue is fixed in version...

CVE-2026-59930

Mistune is a Python Markdown parser with renderers and plugins. Prior to 3.3.0, the toc plugin and TableOfContents directive generate heading IDs as predictable tocN values without slugifying the heading text, allowing attacker-controlled id="tocN" content to collide with generated anchors and...

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-2026-56519

Name of the Vulnerable Software and Affected Versions Mistune versions prior to 3.3.0 Description A Python Markdown parser with renderers and plugins contains an issue where a Markdown document with numerous repeated or distinct reference-link definitions triggers quadratic work within...

PT-2026-56510

Name of the Vulnerable Software and Affected Versions Mistune versions prior to 3.3.0 Description A denial of service issue exists in the default parsing process. Long sequences of well-formed double-asterisk or triple-asterisk emphasis pairs around a character cause quadratic work in...

Any file can be included with the pymdown-snippets extension

SummaryArbitrary file read when using include file syntax. DetailsBy using the syntax --8--"/etc/passwd" or --8--"/proc/self/environ" the content of these files will be rendered in the generated documentation. Additionally, a path relative to a specified, allowed base path can also be used to...

AlmaLinux 9 : python-markdown (ALSA-2026:19366)

The remote AlmaLinux 9 host has a package installed that is affected by a vulnerability as referenced in the ALSA-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...

SUSE-SU-2026:22370-1 Security update for python-Markdown, python-joblib, python-handy-archives, python-apache-libcloud, python-WebOb, python-PyGithub, python-soupsieve

This update for python-Markdown, python-joblib, python-handy-archives, python-apache-libcloud, python-WebOb, python-PyGithub, python-soupsieve fixes the following issues: Changes in python-Markdown: - Fix tests with latest python version bsc1268243 Changes in python-joblib: - Update to 1.5.2:...

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

3.3.4-4.2 - Fix CVE-2025-69534 RHEL-153747...

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...