This page tracks the Debian fix status. The vulnerability itself is described on the main CVE page. View CVE-2026-59881 →

DEBIAN-CVE-2026-59881

AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to 3.14.2, the WebSocket client accepts and decompresses frames...

Original description

The description as published by the source.

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.

Source: OSV.dev (Open Source Vulnerabilities) OSV

Affected packages

Debian:12 python-aiohttp

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Debian:13 python-aiohttp

[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]

Debian:14 python-aiohttp

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.14.3-1"}]}]

References

advisory security-tracker.debian.org