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CVE-2026-85078

6.5 · MEDIUM

Sanic is an opensource python web server/framework.

Published Sep 17, 2026CWE-444EPSS 0.51%

Overview

CVE-2026-85078 is a medium-severity vulnerability. It was published on September 17, 2026 and has a CVSS 3.1 base score of 6.5 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 6.5, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/sanic-org/sanic/commit/47349d689d65fa1907977ac100e867894aeafb22GitHubgithub.com/sanic-org/sanic/commit/69a10d3b06babaa9e5f6d1af577364e9e53b6deaGitHubgithub.com/sanic-org/sanic/commit/a332796506c7c588b6930b02a8886e43eb8ea8d6GitHubgithub.com/sanic-org/sanic/pull/3164GitHubgithub.com/sanic-org/sanic/pull/3165GitHubgithub.com/sanic-org/sanic/releases/tag/v24.12.1GitHubgithub.com/sanic-org/sanic/releases/tag/v25.12.1GitHubgithub.com/sanic-org/sanic/security/advisories/GHSA-wmj6-g64g-j7q5

How CyberStrike helps

Frequently asked questions

What is CVE-2026-85078?

CVE-2026-85078 is a medium-severity vulnerability. It was published on September 17, 2026 and has a CVSS 3.1 base score of 6.5 (MEDIUM).

How severe is CVE-2026-85078?

This vulnerability has a CVSS 3.1 base score of 6.5, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-85078?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-85078?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-85078 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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