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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| aio-libs | aiohttp | < 3.14.0 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | python-aiohttp | 3.14.0-1 | — |
| Debian 13 | python-aiohttp | No fix yet | — |
| Debian 12 | python-aiohttp | 3.8.4-1+deb12u2 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | python-aiohttp | No fix yet | — |
| Ubuntu 25.10 | python-aiohttp | No fix yet | — |
Show 6 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 26.04 LTS | python-aiohttp | No fix yet | — |
| Ubuntu Pro 24.04 LTS | python-aiohttp | No fix yet | — |
| Ubuntu Pro 22.04 LTS | python-aiohttp | No fix yet | — |
| Ubuntu Pro 20.04 LTS | python-aiohttp | No fix yet | — |
| Ubuntu Pro 18.04 LTS | python-aiohttp | No fix yet | — |
| Ubuntu Pro 16.04 LTS | python-aiohttp | No fix yet | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP7 | python-aiohttp | 3.6.0-150100.3.35.1 | SUSE-SU-2026:3059-1 |
| SLES 15 SP6 | python-aiohttp | 3.6.0-150100.3.35.1 | SUSE-SU-2026:3207-1, SUSE-SU-2026:3059-1 |
| SLES 15 SP5 | python-aiohttp | 3.6.0-150100.3.35.1 | SUSE-SU-2026:3207-1, SUSE-SU-2026:3059-1 |
| SLES 15 SP4 | python-aiohttp | 3.6.0-150100.3.35.1 | SUSE-SU-2026:3207-1, SUSE-SU-2026:3059-1 |
| SLES 3 | python-aiohttp | 3.9.3-150400.10.43.1 | SUSE-SU-2026:3207-1 |
Show 7 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 16.0 | python-aiohttp | 3.11.16-160000.5.1 | SUSE-SU-2026:22173-1 |
| SLES for SAP 15 SP6 | python-aiohttp | 3.9.3-150400.10.43.1 | SUSE-SU-2026:3207-1 |
| SLES for SAP 15 SP5 | python-aiohttp | 3.9.3-150400.10.43.1 | SUSE-SU-2026:3207-1 |
| SLES for SAP 15 SP4 | python-aiohttp | 3.9.3-150400.10.43.1 | SUSE-SU-2026:3207-1 |
| SLES 16.0 | python-aiohttp | 3.11.16-160000.5.1 | SUSE-SU-2026:22173-1 |
| SLE HPC 15 SP5 | python-aiohttp | 3.9.3-150400.10.43.1 | SUSE-SU-2026:3207-1 |
| SLE HPC 15 SP4 | python-aiohttp | 3.9.3-150400.10.43.1 | SUSE-SU-2026:3207-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 16.0 | python-aiohttp | 3.11.16-160000.5.1 | openSUSE-SU-2026:21098-1 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | python-aiohttp | No fix yet | — |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 9 | python39-oci-sdk +1 | 2.187.0-1.0.5.el9 | ELSA-2026-604898 |
Wolfi
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Wolfi rolling | airflow-3 | 3.2.2-r1 | — |
| Wolfi rolling | checkov | 3.2.533-r1 | — |
| Wolfi rolling | dask-kubernetes | 2026.3.0-r6 | — |
| Wolfi rolling | katib-earlystopping | 0.19.0-r18 | — |
| Wolfi rolling | open-webui | 0.9.6-r3 | — |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| PyPI | aiohttp | < 3.14.0 | 3.14.0 | GHSA-hg6j-4rv6-33pg |
Advisories 5
- ELSA-2026-604898 Important: python-oci-sdk security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Oct 21, 2026
- SUSE-SU-2026:3207-1 Security update for python-aiohttp SUSE / openSUSE Security Updates · Jul 24, 2026
- SUSE-SU-2026:3059-1 Security update for python-aiohttp SUSE / openSUSE Security Updates · Jul 16, 2026
- openSUSE-SU-2026:21098-1 Security update for python-aiohttp SUSE / openSUSE Security Updates · Jun 30, 2026
- SUSE-SU-2026:22173-1 Security update for python-aiohttp SUSE / openSUSE Security Updates · Jun 24, 2026