Description
AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to 3.14.1, payload resources are not closed correctly when a client disconnects in the middle of a write. If a payload is using an open file or similar limited resource, then an attacker may be able to cause resource starvation temporarily until garbage collection or similar closes the file. This vulnerability is fixed in 3.14.1.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| aio-libs | aiohttp | < 3.14.1 | — |
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 | 3.14.1-1 | — |
| 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 | 3.6.0-150100.3.38.1 | SUSE-SU-2026:3208-1 |
| SLES 15 SP6 | python-aiohttp | 3.6.0-150100.3.38.1 | SUSE-SU-2026:3208-1, SUSE-SU-2026:3207-1 |
| SLES 15 SP5 | python-aiohttp | 3.6.0-150100.3.38.1 | SUSE-SU-2026:3208-1, SUSE-SU-2026:3207-1 |
| SLES 15 SP4 | python-aiohttp | 3.6.0-150100.3.38.1 | SUSE-SU-2026:3208-1, SUSE-SU-2026:3207-1 |
| 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 | 3.11.16-160000.6.1 | SUSE-SU-2026:22819-1 |
| 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 | 3.11.16-160000.6.1 | SUSE-SU-2026:22819-1 |
| 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 | 3.11.16-160000.6.1 | openSUSE-SU-2026:21372-1 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | python-aiohttp | No fix yet | — |
Wolfi
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Wolfi rolling | airflow-3 | 3.2.2-r7 | — |
| Wolfi rolling | open-webui | 0.9.6-r5 | — |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| PyPI | aiohttp | < 3.14.1 | 3.14.1 | GHSA-9x8q-7h8h-wcw9 |
Advisories 4
- SUSE-SU-2026:22819-1 Security update for python-aiohttp SUSE / openSUSE Security Updates · Jul 28, 2026
- SUSE-SU-2026:3207-1 Security update for python-aiohttp SUSE / openSUSE Security Updates · Jul 24, 2026
- SUSE-SU-2026:3208-1 Security update for python-aiohttp SUSE / openSUSE Security Updates · Jul 24, 2026
- openSUSE-SU-2026:21372-1 Security update for python-aiohttp SUSE / openSUSE Security Updates · Jul 22, 2026