CVE-2026-54274 · Symaro Security Advisory

Description

AIOHTTP 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.

Severity (CVSS)

Base score	6.6
Severity	Medium
Version	CVSS 4.0
Vector	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
Provided by	CNA

Weaknesses

CWE-770 — CWE-770: Allocation of Resources Without Limits or Throttling

Affected products

Vendor	Product	Versions
aio-libs	aiohttp	< 3.14.1

References

https://github.com/aio-libs/aiohttp/security/advisories/GHSA-xcgm-r5h9-7989 (x_refsource_CONFIRM)
https://github.com/aio-libs/aiohttp/commit/14b6ee851fb16ec199acb950de0c82d476799e7d (x_refsource_MISC)

Authoritative sources

This page is a snapshot. For the latest enrichment and updates, view the record on CVE.org or the NVD.

Generated from the official CVE List on 23 Jun 2026 10:05 UTC.