CVE-2026-49851

Mistune: Potential DoS via quadratic-time parsing in parse_link_text

CVE-2026-49851 is fixed in python-mistune on 1 platform, first by OPENSUSE-SU-2026:21191-1, released June 29, 2026. It is not reported as exploited. Patch Radar priority: High.

High

CVSS

n/a

Important

Exploitation

None reported

No vendor assessment

CISA KEV

Not listed

Not in the Known Exploited Vulnerabilities catalog

EPSS

0.0052

44th percentile

This update for python-mistune fixes the following issue - CVE-2026-49851: potential DoS via quadratic-time parsing in parse_link_text (bsc#1269091).

Where it's fixed

Product	Fixed in	Fix	Released
Linux
python-mistune · opensuse-leap 16.0	3.1.3-160000.4.1	OPENSUSE-SU-2026:21191-1	Jun 29, 2026
python-mistune · sles 16.0	3.1.3-160000.4.1	SUSE-SU-2026:22495-1	Jun 29, 2026

Details

Published
June 29, 2026
Weakness
Uncontrolled Resource Consumption
Vendor advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-49851

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