Inefficient Algorithmic Complexity Affecting httpx2 package, versions [2.5.0,2.10.0)
Threat Intelligence
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-HTTPX2-20510292
- published5 Oct 2026
- disclosed8 Sept 2026
- creditGalaxySnail
Introduced: 8 Sep 2026
NewCVE-2026-84378 (opens in a new tab)How to fix?
Upgrade httpx2 to version 2.10.0 or higher.
Overview
httpx2 is a The next generation HTTP client.
Affected versions of this package are vulnerable to Inefficient Algorithmic Complexity through the sse. An attacker can cause excessive CPU consumption by sending a long, unterminated line split across many small response chunks from a compromised or malicious SSE endpoint, resulting in quadratic processing time and potential denial of service.