GitHub Advisoryadvisory · PyPI

GHSA-f9xw-jh8m-3mwq AIOHTTP: Absolute-form request targets can spoof Request.scheme

MEDIUM Published 2026-10-20 Modified 2026-10-20 Official page ↗
Aliases
CVE-2026-111748
Ecosystem
PyPI
Packages
aiohttp
Severity
Moderate
CVSS vector
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
Weaknesses
CWE-807
Reviewed
2026-10-20

Affected packages

• PyPI aiohttp: < 3.14.4 → fixed in 3.14.4

Description

Summary An attacker sending an absolute-form request can spoof the scheme used. Impact If user code depends on the `Request.scheme` attribute for anything security related, an attacker may be able to circumvent this logic, tricking the application into thinking a connection is encrypted when it is not, or vice versa. Workaround A WAF rule to reject absolute-form requests (legitimate requests should only use this form for proxies).

Related

Alias · CVE (1)

  • CVE-2026-111748 AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. vulnerability

Weakness · CWE (1)

  • CWE-807 Reliance on Untrusted Inputs in a Security Decision weakness

References