What is CVE-2026-42304?

CVE-2026-42304 is a high-severity vulnerability in Twisted, classified under Uncontrolled Resource Consumption. CVSS score: 7.5/10. Published 2026-05-13.

How severe is CVE-2026-42304?

High severity. CVSS v3 base score is 7.5 out of 10.

Resource exhaustion in Twisted

CVE-2026-42304

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…

Vulnerability class: DoS (Denial of Service)

EPSS: 0.000 (7.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Twisted — versions 26.4.0, < 26.4.0rc2

Weakness classification (CWE)

CWE-400 — Uncontrolled Resource Consumption
CWE-407 — Inefficient Algorithmic Complexity

References

security-advisories@github.com (x_refsource_CONFIRM, Exploit, Mitigation, Vendor Advisory)

Frequently asked questions

What is CVE-2026-42304?: CVE-2026-42304 is a high-severity vulnerability in Twisted, classified under Uncontrolled Resource Consumption. CVSS score: 7.5/10. Published 2026-05-13.
How severe is CVE-2026-42304?: High severity. CVSS v3 base score is 7.5 out of 10.