GitHub Advisoryadvisory · PyPI

GHSA-hg6j-4rv6-33pg AIOHTTP is vulnerable to cross-origin redirect with per-request cookies

MEDIUM Published 2026-06-03 Modified 2026-06-03 Official page ↗
Aliases
CVE-2026-47265
Ecosystem
PyPI
Packages
aiohttp
Severity
Moderate
CVSS vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U
Weaknesses
CWE-346
Reviewed
2026-06-03

Affected packages

• PyPI aiohttp: < 3.14.0 → fixed in 3.14.0

Description

Summary Cookies set with the `cookies` parameter on requests are sent after following a cross-origin redirect. Impact If a developer uses the `cookies` parameter on a per-request basis then sensitive data might be leaked to an attacker if they manage to control a redirect. Workaround If unable to upgrade, using a `Cookie` header in the `headers` parameter is not vulnerable. ----- Patch: https://github.com/aio-libs/aiohttp/commit/f54c40851b0d6c4bbdab97ba518a223adda32478

Related

Alias · CVE (1)

  • CVE-2026-47265 AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. vulnerability

Weakness · CWE (1)

  • CWE-346 Origin Validation Error weakness

References