Linux · SUSE Linux Enterprise · Security advisory · July 14, 2026

SUSE-SU-2026:22655-1: python-mistune security update

SUSE-SU-2026:22655-1, released July 14, 2026, fixes 10 CVEs in python-mistune (version 3.1.3-160000.5.1). None of them is reported as exploited. Patch Radar priority: High.

High

CVEs closed

None rated Critical

Exploited

None reported

Highest CVSS

7.5

Base score, 0 to 10

Highest EPSS

0.0065

51st percentile

Priority of the 10 CVEs

Patch now 0
                                Urgent 0
                                High 5
                                Routine 5

Fixed package versions

Product	Release	Fixed in
python-mistune	sles 16.0	3.1.3-160000.5.1

CVEs this fix closes

Priority	CVE	Title	CVSS	EPSS	Exploitation
High	CVE-2026-59928	Mistune block_parser: quadratic-time parsing on long lists of repeated reference-link definitions	7.5	0.0065	None reported
High	CVE-2026-59922	Mistune plugins/formatting: quadratic-time parsing on long runs of `~~x~~`, `==x==`, and `^^x^^` markers (strikethrough / mark / insert)	7.5	0.0064	None reported
High	CVE-2026-59925	inline_parser: quadratic-time parsing on long runs of `x` and `*x*` emphasis pairs	7.5	0.0064	None reported
High	CVE-2026-59924	python-mistune: improper processing of user-supplied include paths in `Include.parse()` can lead to path traversal	n/a	0.0046	None reported
High	CVE-2026-59923	python-mistune: `HTMLRenderer.safe_url()` does not block percent-encoded javascript URIs and allows for XSS	n/a	0.0035	None reported
Routine	CVE-2026-59927	python-mistune: uncontrolled recursion when processing two markdown files that include each other can lead to a DoS	n/a	0.0053	None reported
Routine	CVE-2026-59929	python-mistune: HARMFUL_PROTOCOLS list misses legacy and chained schemes and allow arbitrary script execution in	n/a	0.0034	None reported
Routine	CVE-2026-59926	Mistune: XSS via unescaped class option in Admonition directive	6.1	0.0033	None reported
Routine	CVE-2026-44896	Mistune: XSS via unescaped figclass/figwidth in Figure directive	n/a	0.0020	None reported
Routine	CVE-2026-59930	Mistune toc / TableOfContents directive: heading IDs use predictable `toc_N` numbering with no slugification, allowing collision with attacker-controlled `id="toc_N"` content	4.3	0.0019	None reported

Also fixes CVE-2026-59928

FEDORA-2026-340793A2F1
python-mistune, python-mistune-doc, python3-mistune on Fedora 43
OPENSUSE-SU-2026:21339-1
python-mistune on opensuse-leap 16.0

Vendor advisory

https://osv.dev/vulnerability/SUSE-SU-2026:22655-1

For tools and AI agents

This page as data: JSON · Markdown

Link to this page

If this page saved you time, a link to it in your ticket, advisory or write-up helps others find it.

HTML

<a href="https://patchblox.com/security/fix/linux/suse-su-2026-22655-1">SUSE-SU-2026:22655-1 on Patchblox Patch Radar</a>

Reusing the data? How to credit Patch Radar.

Which servers are still behind?

Patchblox compares the installed package on every Linux machine against the fixed version for its release, including machines reported through Azure Update Manager.

Get a demo

Patch Radar data is free to use with attribution. Terms and how to credit it.

Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.