AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to 3.14.4, the WebSocket reader continues parsing frames already received after the receive queue pauses the transport, and empty messages are not counted toward the queue size. With permessage-deflate, one read of compressed frames can add many megabytes of decompressed messages to the receive queue.
A remote peer can send many small or compressed messages faster than the application consumes them and cause excessive memory use in a server or client. This issue is fixed in version 3.14.4.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
None
No data leak
Integrity
None
No data modification
Availability
High
Complete denial of service
CVSS Vector v4.0
Weakness Type (CWE)
References 8
https://github.com/aio-libs/aiohttp/commit/0ae507423f681161efa77d20052b4054397c…
security-advisories@github.com
https://github.com/aio-libs/aiohttp/commit/5e54037933fa8422be5fa8a2002d118ed2d4…
security-advisories@github.com
https://github.com/aio-libs/aiohttp/commit/b62321b6fa264a89f4aca084ad60fc38a59f…
security-advisories@github.com
https://github.com/aio-libs/aiohttp/pull/13393
security-advisories@github.com
https://github.com/aio-libs/aiohttp/pull/13545
security-advisories@github.com
https://github.com/aio-libs/aiohttp/pull/13546
security-advisories@github.com
https://github.com/aio-libs/aiohttp/releases/tag/v3.14.4
security-advisories@github.com
https://github.com/aio-libs/aiohttp/security/advisories/GHSA-5rmc-48h2-hvcm
security-advisories@github.com