CVE-2026-34525
Fixed in a distro release EPSS <1%CVSS 6.3
AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to version 3.13.4, multiple Host headers were allowed in aiohttp. This issue has been patched in version 3.13.4.
Products: aio-libs aiohttp
Fixed upstream
| Ecosystem | Package | Fixed in |
|---|---|---|
| PyPI | aiohttp | 3.13.4 |
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| Chainguard | airflow-2 | 2.11.2-r5 |
| Chainguard | airflow-3 | 3.2.1-r0 |
| Chainguard | airflow-3 | 3.1.8-r11 |
| Chainguard | airflow-core-2 | 2.11.2-r3 |
| Chainguard | authentik-2025.12 | 2025.12.4-r3 |
| Chainguard | authentik-2026.2 | 2026.2.1-r3 |
| Chainguard | authentik-fips-2025.12 | 2025.12.4-r3 |
| Chainguard | authentik-fips-2026.2 | 2026.2.1-r3 |
| Chainguard | awx | 24.6.1-r33 |
| Chainguard | checkov | 3.2.517-r0 |
| Chainguard | dask-kubernetes | 2026.3.0-r3 |
| Chainguard | datahub-ingestion | 1.6.0-r1 |
| Chainguard | datahub-ingestion-fips | 1.5.0.1-r1 |
| Chainguard | keep-api | 0.51.0-r2 |
| Chainguard | keep-api-fips | 0.51.0-r2 |
| Chainguard | kserve-storage-controller | 0.17.0-r2 |
| Chainguard | kubeflow-pipelines-visualization-server | 2.16.0-r4 |
| Chainguard | litellm | 1.82.3.0-r3 |
| Chainguard | metaflow-service | 2.5.0-r10 |
| Chainguard | metaflow-service-fips | 2.5.0-r2 |
| Chainguard | open-webui | 0.8.12-r3 |
| Chainguard | py3-cassandra-medusa | 0.27.1-r2 |
| Chainguard | py3.13-scanner-test-libraries-aiohttp | 0.0.1-r3 |
| Chainguard | request-1276 | 0.27.1-r2 |
| Chainguard | text-generation-inference | 3.3.7-r10 |
| Chainguard | tritonserver-backend-vllm-cuda-12.9 | 25.9.0_git20260318-r1 |
| Chainguard | tritonserver-backend-vllm-cuda-13.0 | 25.11-r3 |
| Debian 12 | python-aiohttp | no fix |
| Debian 13 | python-aiohttp | no fix |
| Debian 14 | python-aiohttp | 3.13.5-1 |
| SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS | python-aiohttp | 3.9.3-150400.10.43.1 |
| SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS | python-aiohttp | 3.9.3-150400.10.43.1 |
| SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS | python-aiohttp | 3.9.3-150400.10.43.1 |
| SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS | python-aiohttp | 3.9.3-150400.10.43.1 |
| SUSE Linux Enterprise Module for Public Cloud 15 SP4 | python-aiohttp | 3.9.3-150400.10.43.1 |
| SUSE Linux Enterprise Module for Public Cloud 15 SP4 | python-aiohttp | 3.6.0-150100.3.35.1 |
| SUSE Linux Enterprise Module for Public Cloud 15 SP5 | python-aiohttp | 3.6.0-150100.3.35.1 |
| SUSE Linux Enterprise Module for Public Cloud 15 SP6 | python-aiohttp | 3.6.0-150100.3.35.1 |
| SUSE Linux Enterprise Module for Public Cloud 15 SP7 | python-aiohttp | 3.6.0-150100.3.35.1 |
| SUSE Linux Enterprise Module for Python 3 15 SP7 | python-aiohttp | 3.9.3-150400.10.43.1 |
| SUSE Linux Enterprise Server 15 SP4-LTSS | python-aiohttp | 3.9.3-150400.10.43.1 |
| SUSE Linux Enterprise Server 15 SP5-LTSS | python-aiohttp | 3.9.3-150400.10.43.1 |
| SUSE Linux Enterprise Server 15 SP6-LTSS | python-aiohttp | 3.9.3-150400.10.43.1 |
| SUSE Linux Enterprise Server 16.0 | python-aiohttp | 3.11.16-160000.5.1 |
| SUSE Linux Enterprise Server for SAP Applications 15 SP4 | python-aiohttp | 3.9.3-150400.10.43.1 |
| SUSE Linux Enterprise Server for SAP Applications 15 SP5 | python-aiohttp | 3.9.3-150400.10.43.1 |
| SUSE Linux Enterprise Server for SAP Applications 15 SP6 | python-aiohttp | 3.9.3-150400.10.43.1 |
| SUSE Linux Enterprise Server for SAP applications 16.0 | python-aiohttp | 3.11.16-160000.5.1 |
| Ubuntu 25.10 | python-aiohttp | no fix |
| Ubuntu 26.10 | python-aiohttp | no fix |
| Ubuntu Pro 16.04 LTS | python-aiohttp | no fix |
| Ubuntu Pro 18.04 LTS | python-aiohttp | no fix |
| Ubuntu Pro 20.04 LTS | python-aiohttp | no fix |
| Ubuntu Pro 22.04 LTS | python-aiohttp | no fix |
| Ubuntu Pro 24.04 LTS | python-aiohttp | no fix |
| Ubuntu Pro 26.04 LTS | python-aiohttp | no fix |
| Wolfi | airflow-3 | 3.2.1-r0 |
| Wolfi | airflow-3 | 3.1.8-r11 |
| Wolfi | checkov | 3.2.517-r0 |
| Wolfi | dask-kubernetes | 2026.3.0-r3 |
| Wolfi | kserve-storage-controller | 0.17.0-r2 |
| Wolfi | kubeflow-pipelines-visualization-server | 2.16.0-r4 |
| Wolfi | open-webui | 0.8.12-r3 |
| Wolfi | py3-cassandra-medusa | 0.27.1-r2 |
| openSUSE Leap 16.0 | python-aiohttp | 3.11.16-160000.5.1 |