CVE-2026-22815

AIOHTTP: Uncapped memory usage possible through aiohttp allowing unlimited trailer headers

CVSS 6.9 MEDIUMEPSS 0.4%CWE-400 CWE-770

AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to version 3.13.4, insufficient restrictions in header/trailer handling could cause uncapped memory usage. This issue has been patched in version 3.13.4.

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

Affected products

aio-libs · aiohttp

Want to know if your infrastructure is exposed to this?

Talk to TrueHacking →

References

https://github.com/aio-libs/aiohttp/commit/0c2e9da51126238a421568eb7c5b53e5b5d17b36 https://github.com/aio-libs/aiohttp/releases/tag/v3.13.4 https://github.com/aio-libs/aiohttp/security/advisories/GHSA-w2fm-2cpv-w7v5