aio-libs/aiohttp · Security
AIOHTTP vulnerable to DoS through chunked messages
- GHSA ID
- GHSA-g84x-mcqj-x9qq
- CVE ID
- CVE-2025-69229
- Severity
- medium
- Published
- Updated
- CVSS v4
- 6.6 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U
Description
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
CWEs
- CWE-770 · Allocation of Resources Without Limits or Throttling
References
- https://github.com/aio-libs/aiohttp/security/advisories/GHSA-g84x-mcqj-x9qq ↗
- https://github.com/aio-libs/aiohttp/commit/4ed97a4e46eaf61bd0f05063245f613469700229 ↗
- https://github.com/aio-libs/aiohttp/commit/dc3170b56904bdf814228fae70a5501a42a6c712 ↗
- https://nvd.nist.gov/vuln/detail/CVE-2025-69229 ↗
- https://github.com/advisories/GHSA-g84x-mcqj-x9qq ↗