GitHub Advisoryadvisory · PyPI

GHSA-5wr8-gcqf-gqf3 aiohttp server lacks an initial request/header timeout

HIGH Published 2026-10-19 Modified 2026-10-19 Official page ↗
Aliases
CVE-2026-111064
Ecosystem
PyPI
Packages
aiohttp
Severity
High
CVSS vector
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Weaknesses
CWE-770
Reviewed
2026-10-19

Affected packages

• PyPI aiohttp: < 3.14.4 → fixed in 3.14.4

Description

Summary The keepalive timeout was not used during the initial portion of a request. Impact An attacker could keep an idle connection open indefinitely before sending any data. Workaround Use a reverse proxy (as recommended for all production deployments) with sensible keepalive limits.

Related

Alias · CVE (1)

  • CVE-2026-111064 AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. vulnerability

Weakness · CWE (1)

  • CWE-770 Allocation of Resources Without Limits or Throttling weakness

References