CVE-2026-85078
CVE-2026-85078 updated by NVD
Summary
Sanic is an opensource python web server/framework. In version 25.12.0, Sanic's core HTTP/1.1 chunked-body handling does not fully consume the trailer-part after the terminating zero chunk before reusing the keep-alive connection buffer. A remote unauthenticated client can place attacker-controlled bytes in that trailer region, causing Sanic to parse and route them as a hidden second request after the outer request. This breaks HTTP request-boundary integrity and can provide a request-smuggling primitive when Sanic is deployed behind intermediaries. This issue is fixed in version 25.12.1.
Affected packages
| Ecosystem | Package | Affected versions | Fixed versions |
|---|---|---|---|
| PyPI | sanic | — | 24.12.1, 25.12.1 |
Remediation: Upgrade to 24.12.1 or later.
References
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EPSS scores provided by the FIRST.org Exploit Prediction Scoring System.