CVE-2026-34514

MEDIUM5.3

AIOHTTP: CRLF injection in multipart part content type header construction

Published Apr 1, 2026

Modified 1 months ago

Details

AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to version 3.13.4, an attacker who controls the content_type parameter in aiohttp could use this to inject extra headers or similar exploits. This issue has been patched in version 3.13.4.

References

WEB

https://github.com/aio-libs/aiohttp/commit/9a6ada97e2c6cf1ce31727c6c9fcea17c21f6f06

WEB

https://github.com/aio-libs/aiohttp/releases/tag/v3.13.4

WEB

https://github.com/aio-libs/aiohttp/security/advisories/GHSA-2vrm-gr82-f7m5

ADVISORY

https://www.cve.org/CVERecord?id=CVE-2026-34514

CVSS Analysis

CVSS v4.0

2.7