HTTP Request Smuggling Affecting sanic package, versions [,24.12.1)[25.3.0,25.12.1)
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-SANIC-20046661
- published22 Sept 2026
- disclosed17 Sept 2026
- creditlalala5678
Introduced: 17 Sep 2026
NewCVE-2026-85078 (opens in a new tab)How to fix?
Upgrade sanic to version 24.12.1, 25.12.1 or higher.
Overview
Affected versions of this package are vulnerable to HTTP Request Smuggling in the HTTP/1.1 request parsing process. An attacker can cause the server to interpret leftover bytes in the connection buffer as a new, unintended HTTP request by sending specially crafted chunked requests with malicious content in the trailer area. This can result in the backend executing unauthorized requests within the same connection, potentially bypassing intended request boundaries and leading to unauthorized actions.