CVE-2026-59922
2 advisories.
PyPI/mistune CVE-2026-59922: high 7.5, EPSS 0.64%
Mistune plugins/formatting: quadratic-time parsing on long runs of `~~x~~`, `==x==`, and `^^x^^` markers (strikethrough / mark / insert)
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-c8j7-8cv4-2xmq
- https://github.com/lepture/mistune/security/advisories/GHSA-c8j7-8cv4-2xmq
- https://nvd.nist.gov/vuln/detail/CVE-2026-59922
- https://github.com/lepture/mistune/commit/96d0f57f8fe9eeb06bb4cff521962a27d7c402e7
- 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-2026-2210.yaml
CVE-2026-59922 · published · modified · JSON
PyPI/mistune CVE-2026-59922: high 7.5, EPSS 0.64%
Mistune is a Python Markdown parser with renderers and plugins. Prior to 3.3.0, a run of closed tilde, equals-sign, or caret marker pairs around a character causes quadratic work in src/mistune/plugin
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: PYSEC-2026-2210
- https://github.com/lepture/mistune/releases/tag/v3.3.0
- https://github.com/lepture/mistune/commit/96d0f57f8fe9eeb06bb4cff521962a27d7c402e7
- https://github.com/lepture/mistune/security/advisories/GHSA-c8j7-8cv4-2xmq
CVE-2026-59922 · published · modified · JSON