PyPI/mistune CVE-2026-59930: medium 4.3, EPSS 0.19%
Mistune toc / TableOfContents directive: heading IDs use predictable `toc_N` numbering with no slugification, allowing collision with attacker-controlled `id="toc_N"` content
Action: Upgrade mistune to 3.3.0 or later.
pip install mistune==3.3.0Affected
| introduced | fixed | last affected |
|---|---|---|
| 0 | 3.3.0 | - |
Fixed versions
| 3.3.0 |
Sources
- osv: GHSA-2hm2-hc3v-44h9
- https://github.com/lepture/mistune/security/advisories/GHSA-2hm2-hc3v-44h9
- https://nvd.nist.gov/vuln/detail/CVE-2026-59930
- https://github.com/lepture/mistune/commit/c4093c4742ed0d10d9332fb8edb455869b7b581b
- https://github.com/lepture/mistune
- https://github.com/lepture/mistune/releases/tag/v3.3.0
- https://github.com/pypa/advisory-database/tree/main/vulns/mistune/PYSEC-2026-2218.yaml
CVE-2026-59930 · published · modified · JSON