CVE-2026-47265

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

Published: Jun 2, 2026Updated: Jul 21, 2026 Sources: CVE List NVDCWE-346

7.5HIGH

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.

No summary for this CVE yet.

CVSS Vector Breakdown

Exploitability

AV:NAttack Vector

Network

AC:LAttack Complexity

Low

PR:NPrivileges Required

None

UI:NUser Interaction

None

Scope

S:UScope

Unchanged

Impact

C:HConfidentiality

High

I:NIntegrity

None

A:NAvailability

None

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Weaknesses

CWE-346

Affected Products

aio-libs

oss-projectaka aiosmtpd, aiohttp, aiohttp session

aiohttpLibrary

OSS Libraries / web-framework

aiohttp

oss-project

aiohttpLibrary

OSS Libraries / web-framework

Exploitability

Official Patch Available

Workaround Available

Is your org exposed to CVE-2026-47265?Request an assessment to establish which checks are appropriate for your systems. Check my exposure

References

https://github.com/aio-libs/aiohttp/security/advisories/GHSA-hg6j-4rv6-33pg

github.com

https://github.com/aio-libs/aiohttp/commit/f54c40851b0d6c4bbdab97ba518a223adda32478

github.com

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