CVE-2026-42304

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.

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Produits concernés

• twisted
• Twisted twisted

Scores CVSS

Faiblesses (CWE)

• CWE-400
• CWE-407

Références

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

Ailleurs

• NVD
• CVE.org
• CIRCL Vulnerability-Lookup
• CERT-FR
• GitHub Advisories