CVE-2026-54273CWE-770

AIOHTTP: HTTP/1 Pipelined Requests Queue Without Limit

Medium · published June 22, 2026

CVSS v4.0
6.6
EPSS
0%
Percentile
41.4
In the wild
Unconfirmed
What it is

AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to 3.14.1, no limit was present on the number of pipelined requests that could be queued. An attacker may be able to use pipelined requests to use excessive amounts of memory, potentially leading to DoS. 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
0.00493 · 41.4th percentile
Weakness
CWE-770 · Allocation of Resources Without Limits or Throttling
Published
2026-06-22T16:41Z
EPSS history
Timeline
  • 22 JUN 16:41Z
    AIOHTTP: HTTP/1 Pipelined Requests Queue Without Limit
    cvelistv5