Inefficient Algorithmic Complexity Affecting twisted package, versions [,26.4.0rc2)
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-PYTHON-TWISTED-16424743
- published6 May 2026
- disclosed5 May 2026
- credittomasilluminati
Introduced: 5 May 2026
CVE-2026-42304 (opens in a new tab)How to fix?
Upgrade Twisted to version 26.4.0rc2 or higher.
Overview
Twisted is an event-based network programming and multi-protocol integration framework.
Affected versions of this package are vulnerable to Inefficient Algorithmic Complexity through the decode function in the DNS name decompression process. An attacker can cause the server to hang and exhaust resources by sending a crafted TCP DNS packet with deeply chained compression pointers, resulting in the event loop becoming unresponsive.