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Vulnerabilities

9 CVEs · NVD, GitHub Advisories, CISA KEV, FIRST EPSS, GitHub PoC repos

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CVE-2026-59928
+8 in the same advisory: …59925 …59922 …59923 …59929 …59924 …59927 +2
Mistune is a Python Markdown parser with renderers and plugins.

Mistune is a Python Markdown parser with renderers and plugins. Prior to 3.3.0, a Markdown document containing many repeated or distinct reference-link definitions causes quadratic work in src/mistune/block_parser.py and the ref_links environment dictionary handling, allowing denial of service through CPU exhaustion. This issue is fixed in version 3.3.0.

NVD description · AI analysis pending		7.5
group max
<1% PoC
  • mistune project mistune
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