Is mistune affected by CVE-2026-33079?

PyPI mistune is affected in >=3.0.0a1 <3.2.1.

Is CVE-2026-33079 being exploited?

Not on the CISA KEV list. EPSS exploit probability is 0.3%.

high

CVE-2026-33079

Q: Is CVE-2026-33079 being exploited?

Not on the CISA KEV list. EPSS exploit probability is 0.3%.

PyPI · mistune

Summary

Mistune has a ReDoS in LINK_TITLE_RE that allows denial of service via crafted Markdown input

Severity: high
EPSS: 0.3% (p26)
Also known as: GHSA-8mp2-v27r-99xp
Published: 2026-05-06

References

https://github.com/lepture/mistune/security/advisories/GHSA-8mp2-v27r-99xp
https://nvd.nist.gov/vuln/detail/CVE-2026-33079
https://github.com/lepture/mistune

Related advisories

CVE-2026-44896 — medium · PyPI/mistune
CVE-2026-44899 — medium · PyPI/mistune
CVE-2026-44898 — medium · PyPI/mistune
CVE-2026-44897 — medium · PyPI/mistune
CVE-2026-44708 — medium · PyPI/mistune

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Sources: CISA KEV (public domain), OSV.dev & GitHub Advisory Database (CC-BY-4.0), FIRST EPSS, NVD/CWE (public domain). Served live from the Stateward advisory database.