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.
References
| Link | Resource |
|---|---|
| https://github.com/twisted/twisted/security/advisories/GHSA-grgv-6hw6-v9g4 | Exploit Mitigation Vendor Advisory |
| https://github.com/twisted/twisted/security/advisories/GHSA-grgv-6hw6-v9g4 | Exploit Mitigation Vendor Advisory |
Configurations
Configuration 1 (hide)
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History
19 May 2026, 16:47
| Type | Values Removed | Values Added |
|---|---|---|
| First Time |
Twisted
Twisted twisted |
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| CPE | cpe:2.3:a:twisted:twisted:*:*:*:*:*:*:*:* cpe:2.3:a:twisted:twisted:26.4.0:rc1:*:*:*:*:*:* |
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| References | () https://github.com/twisted/twisted/security/advisories/GHSA-grgv-6hw6-v9g4 - Exploit, Mitigation, Vendor Advisory |
14 May 2026, 16:16
| Type | Values Removed | Values Added |
|---|---|---|
| References | () https://github.com/twisted/twisted/security/advisories/GHSA-grgv-6hw6-v9g4 - |
13 May 2026, 21:16
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-05-13 21:16
Updated : 2026-05-19 16:47
NVD link : CVE-2026-42304
Mitre link : CVE-2026-42304
CVE.ORG link : CVE-2026-42304
JSON object : View
Products Affected
twisted
- twisted