Unchecked Input for Loop Condition Affecting python-mistune package, versions *


Severity

Recommended
0.0
high
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.41% (35th percentile)

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  • Snyk IDSNYK-RHEL10-PYTHONMISTUNE-21456913
  • published23 Oct 2026
  • disclosed22 Oct 2026

Introduced: 22 Oct 2026

NewCVE-2026-115347  (opens in a new tab)
CWE-606  (opens in a new tab)

How to fix?

There is no fixed version for RHEL:10 python-mistune.

NVD Description

Note: Versions mentioned in the description apply only to the upstream python-mistune package and not the python-mistune package as distributed by RHEL. See How to fix? for RHEL:10 relevant fixed versions and status.

Mistune before 3.3.0 contains an inefficient algorithmic complexity vulnerability in parse_link_text that allows remote attackers to cause denial of service through unbalanced square brackets. Attackers can submit markdown containing long runs of unmatched brackets to mistune.html(), triggering repeated forward scans that stall worker processes for minutes.

CVSS Base Scores

version 3.1