PT-2026-56510 · Pypi · Mistune

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CVE-2026-59925

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Published

2026-07-08

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Updated

2026-07-20

CVSS v3.1

7.5

High

VectorAV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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 src/mistune/inline parser.py because the parser scans forward for matching close markers from every potential opening run.
Recommendations Update to version 3.3.0.

Exploit

Fix

DoS

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Weakness Enumeration

Related Identifiers

AZL-92217
CVE-2026-59925
ECHO-A954-A105-41DF
GHSA-4J32-57V6-6G45
OPENSUSE-SU-2026:21339-1
PYSEC-2026-2213
SUSE-SU-2026:22655-1

Affected Products

Mistune