Is twisted affected by CVE-2026-42304?

PyPI twisted is affected in <26.4.0.

Is CVE-2026-42304 being exploited?

Not on the CISA KEV list. EPSS exploit probability is 0.4%.

high

CVE-2026-42304

Q: Is CVE-2026-42304 being exploited?

Not on the CISA KEV list. EPSS exploit probability is 0.4%.

PyPI · twisted

Summary

Twisted is an event-based framework for internet applications, supporting Python 3.6+. Prior to 26.4.0rc2, the twisted.names module is vulnerable to a Denial of Service (DoS) attack via resource exhaustion during DNS name decompression. A remote, unauthenticated attacker can exploit this by sending

Severity: high
EPSS: 0.4% (p34)
Also known as: GHSA-grgv-6hw6-v9g4, PYSEC-2026-160
Published: 2026-05-13

References

https://github.com/twisted/twisted/security/advisories/GHSA-grgv-6hw6-v9g4

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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.