CVE-2026-47265

HIGH

AIOHTTP vulnerable to cross-origin redirect with per-request cookies

Title source: cna
STIX 2.1

Description

AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to version 3.14.0, cookies set with the `cookies` parameter on requests are sent after following a cross-origin redirect. 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. Version 3.14.0 patches the issue. If unable to upgrade, using a `Cookie` header in the `headers` parameter is not vulnerable.

References (2)

Core 2

Scores

CVSS v3 7.5
EPSS 0.0015
EPSS Percentile 4.5%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact partial

Details

CWE
CWE-346
Status published
Products (3)
aio-libs/aiohttp < 3.14.0
aiohttp/aiohttp < 3.14.0
pypi/aiohttp 0 - 3.14.0PyPI
Published Jun 02, 2026
Tracked Since Jun 03, 2026