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VULNERABILITIES

CVE-2026-47265 Details

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.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:7.5 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://github.com/aio-libs/aiohttp/commit/f54c40851b0d6c4bbdab97ba518a223adda32478 [email protected]Patch
https://github.com/aio-libs/aiohttp/security/advisories/GHSA-hg6j-4rv6-33pg [email protected]MitigationPatchVendor Advisory

Weakness Enumeration

CWE-IDCWE NameSource
CWE-346Origin Validation Error[email protected]

Affected Products

ProductVersions
aiohttp aiohttp
< 3.14.0

CPE

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

Remediation

  • No remediation found in references.

Change History

5 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-47265
NVD Published Date:
Jun 2, 2026
NVD Last Modified:
Jul 21, 2026
Source:
[email protected]
CVE-2026-47265 Details - Not Deferred