AIOHTTP: WebSocket client accepts compressed frames without negotiated permessage-deflate

SummaryThe client accepts and decompresses frames with the RSV1 bit set even when the permessage-deflate extension was not negotiated. ImpactA client may unexpectedly decompress WebSocket frames when explicitly opted out. This could lead to additional CPU/memory consumption, but is unlikely to be...

PYSEC-2026-3547 AIOHTTP: WebSocket client accepts compressed frames without negotiated permessage-deflate

Summary The client accepts and decompresses frames with the RSV1 bit set even when the permessage-deflate extension was not negotiated. Impact A client may unexpectedly decompress WebSocket frames when explicitly opted out. This could lead to additional CPU/memory consumption, but is unlikely to ...

EUVD-2026-51257

AIOHTTP: WebSocket client accepts compressed frames without negotiated permessage-deflate...

GHSA-MQ44-7P77-Q5H7 AIOHTTP: WebSocket client accepts compressed frames without negotiated permessage-deflate

Summary The client accepts and decompresses frames with the RSV1 bit set even when the permessage-deflate extension was not negotiated. Impact A client may unexpectedly decompress WebSocket frames when explicitly opted out. This could lead to additional CPU/memory consumption, but is unlikely to ...

AIOHTTP: WebSocket client accepts compressed frames without negotiated permessage-deflate

Summary The client accepts and decompresses frames with the RSV1 bit set even when the permessage-deflate extension was not negotiated. Impact A client may unexpectedly decompress WebSocket frames when explicitly opted out. This could lead to additional CPU/memory consumption, but is unlikely to ...

SUSE 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 with the RSV1 bit set even when the permessage-deflate extension was not negotiated, allowing a malicious server to cause unexpected CPU and memory...

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 with the RSV1 bit set even when the permessage-deflate extension was not negotiated, allowing a malicious server to cause unexpected CPU and memory...

AZL-94397 CVE-2026-59881 affecting package python-aiohttp 3.6.2-3

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...

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 with the RSV1 bit set even when the permessage-deflate extension was not negotiated, allowing a malicious server to cause unexpected CPU and memory...

CVE-2026-59881 AIOHTTP: WebSocket client accepts compressed frames without negotiated permessage-deflate

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...

CVE-2026-59881 AIOHTTP: WebSocket client accepts compressed frames without negotiated permessage-deflate

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...

CVE-2026-59881 AIOHTTP: WebSocket client accepts compressed frames without negotiated permessage-deflate

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...

CVE-2026-59881

AIOHTTP WebSocket client vulnerability: before 3.14.2, the client accepts and decompresses frames with RSV1 set even when permessage-deflate was not negotiated, enabling potential CPU and memory overuse by a malicious server. Affected: AIOHTTP (WebSocket client). Root cause: decompressing frames ...

PT-2026-66548

Name of the Vulnerable Software and Affected Versions AIOHTTP versions prior to 3.14.2 Description The WebSocket client accepts and decompresses frames with the RSV1 bit set even when the permessage-deflate extension a mechanism used to compress WebSocket messages to reduce bandwidth was not...

EUVD-2026-42364

httplib2: Decompression Bomb Denial of Service via Unbounded gzip/deflate Response Handling...

GHSA-J5G9-F88F-GFJ3 httplib2: Decompression Bomb Denial of Service via Unbounded gzip/deflate Response Handling

Summary The httplib2 HTTP client library performs unbounded decompression of HTTP response bodies encoded with Content-Encoding: gzip or deflate. A malicious or compromised HTTP server can return a small compressed payload approximately 150 KB that expands to an arbitrarily large size in memory 1...

Denial Of Service (DoS)

websocket-driver is vulnerable to Denial Of Service DoS. The vulnerability is due to validating only the compressed message size instead of the decompressed size when using the permessage-deflate extension, which allows an attacker to send highly compressed messages that expand beyond the...

Linux Distros Unpatched Vulnerability : CVE-2026-54464

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - Impact If this library is used in tandem with the permessage-deflate extension, a WebSocket server or client can be made to accept messages that are larger than...

Linux Distros Unpatched Vulnerability : CVE-2026-54490

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - websocket-driver is a WebSocket protocol handler with pluggable I/O. Prior to 0.7.5, if this library is used with the permessage-deflate extension, a WebSocket...

DEBIAN-CVE-2026-54490

websocket-driver is a WebSocket protocol handler with pluggable I/O. Prior to 0.7.5, if this library is used with the permessage-deflate extension, a WebSocket server or client can be made to accept messages that are larger than the configured maximum message size because the limit is checked...