GHSA-g84x-mcqj-x9qq (CVE-2025-69229)

Details

Summary

Handling of chunked messages can result in excessive blocking CPU usage when receiving a large number of chunks.

Impact

If an application makes use of the request.read() method in an endpoint, it may be possible for an attacker to cause the server to spend a moderate amount of blocking CPU time (e.g. 1 second) while processing the request. This could potentially lead to DoS as the server would be unable to handle other requests during that time.

Patch: https://github.com/aio-libs/aiohttp/commit/dc3170b56904bdf814228fae70a5501a42a6c712 Patch: https://github.com/aio-libs/aiohttp/commit/4ed97a4e46eaf61bd0f05063245f613469700229

Affected Packages

aiohttp

PyPI

Fixed in:

3.13.3

References

ADVISORY

https://github.com/advisories/GHSA-g84x-mcqj-x9qq

PACKAGE

https://github.com/aio-libs/aiohttp

WEB

https://github.com/aio-libs/aiohttp/commit/4ed97a4e46eaf61bd0f05063245f613469700229

WEB

https://github.com/aio-libs/aiohttp/commit/dc3170b56904bdf814228fae70a5501a42a6c712

WEB

https://github.com/aio-libs/aiohttp/security/advisories/GHSA-g84x-mcqj-x9qq

ADVISORY

https://nvd.nist.gov/vuln/detail/CVE-2025-69229