CVE-2026-54274CWE-770

AIOHTTP: Incomplete websocket frame payloads bypass memory limits

Medium · published June 22, 2026

CVSS v4.0
6.6
EPSS
1%
Percentile
44.6
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
6.6 · MEDIUM
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
EPSS
0.00539 · 44.6th percentile
Weakness
CWE-770 · Allocation of Resources Without Limits or Throttling
Published
2026-06-22T16:33Z
EPSS history
Timeline
  • 22 JUN 16:33Z
    AIOHTTP: Incomplete websocket frame payloads bypass memory limits
    cvelistv5