CVE-2026-54274

NameCVE-2026-54274
DescriptionAIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to 3.14.1, if an attacker sends large incomplete websocket frame payloads, it may be possible to bypass the usual size limits on memory use. This vulnerability is fixed in 3.14.1.
SourceCVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
python-aiohttp (PTS)bullseye3.7.4-1vulnerable
bullseye (security)3.7.4-1+deb11u2vulnerable
bookworm, bookworm (security)3.8.4-1+deb12u1vulnerable
trixie (security), trixie3.11.16-1+deb13u1vulnerable
forky, sid3.14.1-1fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
python-aiohttpsource(unstable)3.14.1-1

Notes

https://github.com/aio-libs/aiohttp/security/advisories/GHSA-xcgm-r5h9-7989
Fixed by: https://github.com/aio-libs/aiohttp/commit/14b6ee851fb16ec199acb950de0c82d476799e7d (v3.14.1)
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