Hi,

The following vulnerability was published for python-aiohttp.

CVE-2026-59881[0]:
| AIOHTTP is an asynchronous HTTP client/server framework for asyncio
| and Python. Prior to 3.14.2, the WebSocket client accepts and
| decompresses frames with the RSV1 bit set even when the permessage-
| deflate extension was not negotiated, allowing a malicious server to
| cause unexpected CPU and memory consumption. This issue is fixed in
| version 3.14.2.


If you fix the vulnerability please also make sure to include the
CVE (Common Vulnerabilities & Exposures) id in your changelog entry.

For further information see:

[0] https://security-tracker.debian.org/tracker/CVE-2026-59881
https://www.cve.org/CVERecord?id=CVE-2026-59881
[1] https://github.com/aio-libs/aiohttp/security/advisories/GHSA-mq44-7p77-q5h7
[2] https://github.com/aio-libs/aiohttp/pull/12978
[3] https://github.com/aio-libs/aiohttp/commit/47fb6ae354d4fa22048f4dbe7dbf82b625f0a2f6

Please adjust the affected versions in the BTS as needed.

Regards,
Salvatore