python-aiohttp: AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python
CVE-2026-59881 is fixed in 3 products on 1 platform, first by DEBIAN-CVE-2026-59881, released July 30, 2026. It is not reported as exploited. Patch Radar priority: Routine.
AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to 3.14.2, the WebSocket client accepts and decompresses frames with the RSV1 bit set even when the permessage-deflate extension was not negotiated, allowing a malicious server to cause unexpected CPU and memory consumption. This issue is fixed in version 3.14.2.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| python-aiohttp · Debian 12.15 (bookworm) | 3.8.4-1+deb12u2 | DEBIAN-CVE-2026-59881 | Jul 30, 2026 |
| python-aiohttp · Debian 14 | 3.14.3-1 | DEBIAN-CVE-2026-59881 | Jul 30, 2026 |
| python-aiohttp · opensuse-leap 16.0 | 3.11.16-160000.7.1 | OPENSUSE-SU-2026:21687-1 | Aug 30, 2026 |
| python-aiohttp · sles 15.6 | 3.6.0-150100.3.41.1 | SUSE-SU-2026:4113-1 | Sep 9, 2026 |
| python-aiohttp · sles 15.7 | 3.6.0-150100.3.41.1 | SUSE-SU-2026:4113-1 | Sep 9, 2026 |
| python-aiohttp · sles 16.0 | 3.11.16-160000.7.1 | SUSE-SU-2026:23571-1 | Aug 30, 2026 |
| python39-oci-sdk · ol 9 | 0:2.187.0-1.0.5.el9 | ELSA-2026-604898 | Nov 7, 2026 |
| python39-oci-sdk-docs · ol 9 | 0:2.187.0-1.0.5.el9 | ELSA-2026-604898 | Nov 7, 2026 |
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