CVE-2026-47265
Published:June 02, 2026
Updated:June 13, 2026
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.
Affected Packages
https://github.com/aio-libs/aiohttp.git (GITHUB):
Affected version(s) >=v0.1 <v3.14.0Fix Suggestion:
Update to version v3.14.0aiohttp (PYTHON):
Affected version(s) >=0.1 <3.14.0Fix Suggestion:
Update to version 3.14.0aiohttp (PYTHON):
Affected version(s) >=0.1 <3.14.0Fix Suggestion:
Update to version 3.14.0Related Resources (4)
Do you need more information?
Contact UsCVSS v4
Base Score:
6.6
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
NONE
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
Exploit Maturity
UNREPORTED
CVSS v3
Base Score:
7.5
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Weakness Type (CWE)
Origin Validation Error
EPSS
Base Score:
0.02