LOW

GHSA-2vrm-gr82-f7m5

AIOHTTP has CRLF injection through multipart part content type header construction

Details

### Summary

An attacker who controls the `content_type` parameter in aiohttp could use this to inject extra headers or similar exploits.

### Impact

If an application allows untrusted data to be used for the multipart `content_type` parameter when constructing a request, an attacker may be able to manipulate the request to send something other than what the developer intended.

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

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Affected packages

PyPI / aiohttp

Introduced in: 0 Fixed in: 3.13.4

Fix pip install --upgrade 'aiohttp>=3.13.4'

References

https://github.com/aio-libs/aiohttp/security/advisories/GHSA-2vrm-gr82-f7m5 [WEB]
https://nvd.nist.gov/vuln/detail/CVE-2026-34514 [ADVISORY]
https://github.com/aio-libs/aiohttp/commit/9a6ada97e2c6cf1ce31727c6c9fcea17c21f6f06 [WEB]
https://github.com/aio-libs/aiohttp [PACKAGE]
https://github.com/aio-libs/aiohttp/releases/tag/v3.13.4 [WEB]