TI-2026-34845 Aliases CVE-2026-47265 GHSA-hg6j-4rv6-33pg

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

LOW 34CWE-346Published 2026-06-02 · Updated 2026-06-03

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Attack requirements: None
Impact type: Security bypass
Confidentiality · integrity · availability: High · None · None
Fix status: Partial Red Hat: 10 without a fix

Attack profile from CVSS 4.0 · CNA. Fix status from CNA, GitHub and Red Hat. Impact type from CWE-346.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.0015 4th percentileScored 2026-11-07

Fix Partial aiohttp (aio-libs): 3.14.0aiohttp (PyPI): 3.14.0Red Hat: 10 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: Yes
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
aio-libs	aiohttp	before 3.14.0	3.14.0	Patch available	CNA
—	aiohttp (PyPI)	before 3.14.0	3.14.0	Patch available	GHSA-hg6j-4rv6-33pg

aiohttp Vendoraio-libs Affected before 3.14.0 Fixed in 3.14.0 Patch available CNA
aiohttp (PyPI) Vendor— Affected before 3.14.0 Fixed in 3.14.0 Patch available GHSA-hg6j-4rv6-33pg

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:aiohttp:aiohttp::::::::	before 3.14.0	Vulnerable	Aiohttp

cpe:2.3:a:aiohttp:aiohttp:*:*:*:*:*:*:*:* Versions before 3.14.0 Vulnerable ·Aiohttp

Remediation

Fix · CNA aiohttp (aio-libs) Fixed in 3.14.0
Fix · GHSA-hg6j-4rv6-33pg aiohttp (PyPI) Fixed in 3.14.0 Advisory →

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

Product	Status	Plan or fix
Exploit Intelligence	Affected	No fix yet: Fix deferred
Migration Toolkit for Applications 8	Affected	No fix yet: Fix deferred
OpenShift Lightspeed	Affected	No fix yet: Fix deferred
Red Hat AI Inference Server	Affected	No fix yet: Fix deferred
Red Hat Ansible Automation Platform 2	Affected	No fix yet: Fix deferred
Red Hat Ansible Automation Platform Ansible Core 2	Affected	No fix yet: Fix deferred
Red Hat Discovery 2	Affected	No fix yet: Fix deferred
Red Hat Enterprise Linux AI (RHEL AI) 3	Affected	No fix yet: Fix deferred
Red Hat OpenShift AI (RHOAI)	Affected	No fix yet: Fix deferred
Red Hat Satellite 6	Affected	No fix yet: Fix deferred

Not affected: 1 product

Red Hat Hardened Images

Timeline

2026-10-02 Threatist record created from CVE-2026-47265
2026-10-03 Alias added: GHSA-hg6j-4rv6-33pg

References

Patch 2

Advisory 1

https://nvd.nist.gov/vuln/detail/CVE-2026-47265

Other 1

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

TI-2025-38826 aiomysql allows arbitrary access to client files through vulnerability of a malicious MySQL server CVSS 4.0HIGH 8.2
TI-2024-15436 aiohttp.web.static(follow_symlinks=True) is vulnerable to directory traversal CVSS 3.1HIGH 7.5
TI-2023-25769 Request smuggling in aiohttp CVSS 3.1HIGH 7.5
TI-2023-18906 aiohttp vulnerable to HTTP request smuggling CVSS 3.1HIGH 7.5
TI-2023-26746 aiohttp's ClientSession is vulnerable to CRLF injection via version CVSS 3.1HIGH 7.2
TI-2026-66145 Multidict: Reference leak in CIMultiDict/MultiDict items-view union and subtraction CVSS 3.1MEDIUM 5.3

See all 59 →

Sources

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