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.
Metrics
Affected Vendors & Products
References
History
Wed, 08 Jul 2026 20:30:00 +0000
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ssvc
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Wed, 08 Jul 2026 19:15:00 +0000
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Lepture
Lepture mistune |
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| Vendors & Products |
Lepture
Lepture mistune |
Wed, 08 Jul 2026 17:00:00 +0000
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| Description | 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. | |
| Title | Mistune block_parser: quadratic-time parsing on long lists of repeated reference-link definitions | |
| Weaknesses | CWE-1333 CWE-407 |
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| References |
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| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: GitHub_M
Published:
Updated: 2026-07-08T19:40:43.968Z
Reserved: 2026-07-07T18:20:06.126Z
Link: CVE-2026-59928
Updated: 2026-07-08T17:45:57.618Z
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OpenCVE Enrichment
Updated: 2026-07-08T19:00:07Z