HIGHCVSS 7.5Vulnerability
CVE-2026-76098
Mistune is a Python Markdown parser with renderers and plugins. Versions 3.3.0 through 3.3.2 are vulnerable to DoS through deeply nested tokens. HTML rendering creates deeply nested emphasis tokens from consecutive asterisk characters, and recursive rendering in HTMLRenderer.render_token() can exceed Python's recursion limit and raise RecursionError, allowing crafted Markdown to crash a parsing process. This issue is fixed in version 3.3.3
Properties
- summary
- Mistune: Denial of Service — RecursionError via Excessive Emphasis Markers in Markdown
- severity
- HIGH
- epss_score
- 0.00488
- cvss_severity
- HIGH
- cvss_score
- 7.5
- retrieved_at
- 2026-10-16T11:46:58+00:00
- ghsa_published
- 2026-09-02T15:14:55Z
- source_url
- https://github.com/advisories/GHSA-6m44-fpc8-c3rq
- ghsa_updated
- 2026-09-02T15:14:56Z
- ghsa_id
- GHSA-6m44-fpc8-c3rq
- score
- 7.5
- last_source
- FIRST EPSS
- cve_id
- CVE-2026-76098
- cvss_vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- signal_observed_at
- 2026-09-11T17:55:57+00:00
- is_ghsa_only
- false
- vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- published_at
- 2026-08-24T20:17:19.330
- last_modified
- 2026-09-09T21:06:39.057
- epss_percentile
- 0.40555
Related Entities (6)
DESCRIBED_BY (1)
→[Source]NVD
ENRICHED_BY (1)
→[Source]FIRST EPSS
VULNERABLE_TO (1)
←[Software]pip/mistune
AFFECTS (1)
→[Software]pip/mistune
HAS_WEAKNESS (1)
→[Weakness]Uncontrolled Recursion
REPORTED_BY (1)
→[Source]GitHub Advisory Database
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