CVE-2026-47265

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.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/aio-libs/aiohttp/commit/f54c40851b0d6c4bbdab97ba518a223adda32478	Patch
https://github.com/aio-libs/aiohttp/security/advisories/GHSA-hg6j-4rv6-33pg	Mitigation Patch Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:aiohttp:aiohttp:*:*:*:*:*:*:*:*

History

05 Jun 2026, 13:39

Type	Values Removed	Values Added
CPE		cpe:2.3:a:aiohttp:aiohttp::::::::
First Time		Aiohttp Aiohttp aiohttp
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 7.5
References	~~() https://github.com/aio-libs/aiohttp/commit/f54c40851b0d6c4bbdab97ba518a223adda32478 -~~	() https://github.com/aio-libs/aiohttp/commit/f54c40851b0d6c4bbdab97ba518a223adda32478 - Patch
References	~~() https://github.com/aio-libs/aiohttp/security/advisories/GHSA-hg6j-4rv6-33pg -~~	() https://github.com/aio-libs/aiohttp/security/advisories/GHSA-hg6j-4rv6-33pg - Mitigation, Patch, Vendor Advisory

02 Jun 2026, 20:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-06-02 20:16

Updated : 2026-06-17 10:54

NVD link : CVE-2026-47265

Mitre link : CVE-2026-47265

CVE.ORG link : CVE-2026-47265

JSON object : View

Products Affected

aiohttp

aiohttp

CWE

CWE-346

Origin Validation Error

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