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.
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Affected Vendors & Products
Advisories
No advisories yet.
Fixes
Solution
No solution given by the vendor.
Workaround
No workaround given by the vendor.
References
History
Thu, 29 Oct 2026 13:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | 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. | |
| Title | Python-Markdown 3.0 through 3.11.2 Denial of Service via Link Bracket Parsing | |
| First Time appeared |
Python-markdown2 Project
Python-markdown2 Project python-markdown2 |
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| Weaknesses | CWE-407 | |
| CPEs | cpe:2.3:a:python-markdown2_project:python-markdown2:*:*:*:*:*:*:*:* | |
| Vendors & Products |
Python-markdown2 Project
Python-markdown2 Project python-markdown2 |
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| References |
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| Metrics |
cvssV3_1
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Projects
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Status: PUBLISHED
Assigner: VulnCheck
Published:
Updated: 2026-10-29T13:08:49.597Z
Reserved: 2026-10-29T11:51:49.648Z
Link: CVE-2019-25781
No data.
Status : Awaiting Analysis
Published: 2026-10-29T14:17:39.170
Modified: 2026-10-29T16:19:37.750
Link: CVE-2019-25781
No data.
OpenCVE Enrichment
Updated: 2026-10-29T15:30:16Z
Weaknesses