PT-2026-132110

CVE-2019-25781

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Published

2026-10-29

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Updated

2026-10-29

Description by

CVSS 3.1
7.5
High
MetricsAV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Python-Markdown 3.0 through 3.11.2 contains an algorithmic complexity vulnerability in inline link parsing that allows remote attackers to exhaust CPU through unmatched brackets. Attackers can submit short Markdown containing repeated [ or ![ characters, forcing LinkInlineProcessor.getText() and getLink() into quadratic scans that keep workers busy for minutes.
Exploitability
Fix
Researchers
Vendors
Affected products
Weakness enumeration
CWE-407: Inefficient Algorithmic Complexity
Related identifiers
CVE-2019-25781
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