The vulnerability of the Python Markdown library’s extensions, specifically pymdown-extensions, arises from the use of a regular expression “c” with inefficient computational complexity. This allows attackers to trigger a denial-of-service attack.
🗓️ 25 Mar 2026 00:00:00Reported by FSTEC of Russia — Information Security Threat DatabaseType 
bdu_fstec🔗 bdu.fstec.ru👁 9 Views
| Reporter | Title | Published | Views | Family All 22 |
|---|---|---|---|---|
 | CVE-2025-68142 | 15 Dec 202522:07 | – | circl |
 | PyMdown Extensions 安全漏洞 | 16 Dec 202500:00 | – | cnnvd |
 | CVE-2025-68142 | 16 Dec 202518:06 | – | cve |
 | CVE-2025-68142 PyMdown Extensions has ReDOS bug in Figure Capture extension | 16 Dec 202518:06 | – | cvelist |
 | CVE-2025-68142 | 16 Dec 202518:06 | – | debiancve |
 | EUVD-2025-203840 | 16 Dec 202520:46 | – | euvd |
 | PyMdown Extensions has a ReDOS bug in its Figure Capture extension | 16 Dec 202520:46 | – | github |
 | CVE-2025-68142 | 16 Dec 202518:16 | – | nvd |
 | DEBIAN-CVE-2025-68142 | 16 Dec 202518:16 | – | osv |
| GHSA-R6H4-MM7H-8PMQ PyMdown Extensions has a ReDOS bug in its Figure Capture extension | 16 Dec 202520:46 | – | osv |
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25 Mar 2026 00:00Current
5.7Medium risk
Vulners AI Score5.7
CVSS 25
CVSS 35.3
EPSS0.00371