Is CVE-2026-42304 actively exploited?

No active exploitation of CVE-2026-42304 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-42304 be exploited remotely?

Yes. CVE-2026-42304 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-42304?

CVE-2026-42304 has a CVSS score of 7.5 (HIGH).

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HIGH

CVE-2026-42304

CWE-400Published: May 13, 2026· Updated: May 19, 2026

7.5

CVSS v3.1

EPSS:0.01%probability of exploitation in 30 daysPercentile:1.6th

Official Description

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 a crafted TCP DNS packet containing deeply chained compression pointers. This flaw bypasses previous loop-prevention logic, causing the single-threaded Twisted reactor to hang while processing millions of recursive lookups, effectively freezing the server. This vulnerability is fixed in 26.4.0rc2.

NVD Source

Technical Analysis

CVE-2026-42304 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 7.5.