GHSA-V9P9-HFJ2-HCW8 Undici has Unhandled Exception in WebSocket Client Due to Invalid server_max_window_bits Validation

Impact The undici WebSocket client is vulnerable to a denial-of-service attack due to improper validation of the servermaxwindowbits parameter in the permessage-deflate extension. When a WebSocket client connects to a server, it automatically advertises support for permessage-deflate compression....

Linux Distros Unpatched Vulnerability : CVE-2026-2229

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - ImpactThe undici WebSocket client is vulnerable to a denial-of-service attack due to improper validation of the servermaxwindowbits parameter in the...

Linux Distros Unpatched Vulnerability : CVE-2026-1526

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - The undici WebSocket client is vulnerable to a denial-of-service attack via unbounded memory consumption during permessage-deflate decompression. When a WebSock...

Improper Handling of Highly Compressed Data (Data Amplification)

Overview org.webjars.npm:undici is an An HTTP/1.1 client, written from scratch for Node.js Affected versions of this package are vulnerable to Improper Handling of Highly Compressed Data Data Amplification in the PerMessageDeflate.decompress method of the permessage-deflate extension. An attacker...

Improper Handling of Highly Compressed Data (Data Amplification)

Overview undici is an An HTTP/1.1 client, written from scratch for Node.js Affected versions of this package are vulnerable to Improper Handling of Highly Compressed Data Data Amplification in the PerMessageDeflate.decompress method of the permessage-deflate extension. An attacker can cause...

Uncaught Exception

Overview undici is an An HTTP/1.1 client, written from scratch for Node.js Affected versions of this package are vulnerable to Uncaught Exception through improper validation of the servermaxwindowbits parameter in the permessage-deflate extension. An attacker can cause the process to terminate...

Uncaught Exception

Overview org.webjars.npm:undici is an An HTTP/1.1 client, written from scratch for Node.js Affected versions of this package are vulnerable to Uncaught Exception through improper validation of the servermaxwindowbits parameter in the permessage-deflate extension. An attacker can cause the process...

CVE-2026-1526

A flaw was found in undici. A remote attacker can exploit this vulnerability by sending a specially crafted compressed frame, known as a "decompression bomb," during permessage-deflate decompression. The undici WebSocket client does not properly limit the size of decompressed data, leading to...

CVE-2026-2229

A flaw was found in the undici WebSocket client. A remote malicious server can exploit this vulnerability by sending a WebSocket frame with an invalid servermaxwindowbits parameter within the permessage-deflate extension. This improper validation causes the client's Node.js process to terminate,...

DEBIAN-CVE-2026-2229

ImpactThe undici WebSocket client is vulnerable to a denial-of-service attack due to improper validation of the servermaxwindowbits parameter in the permessage-deflate extension. When a WebSocket client connects to a server, it automatically advertises support for permessage-deflate compression. ...

CVE-2026-2229

ImpactThe undici WebSocket client is vulnerable to a denial-of-service attack due to improper validation of the servermaxwindowbits parameter in the permessage-deflate extension. When a WebSocket client connects to a server, it automatically advertises support for permessage-deflate compression. ...

DEBIAN-CVE-2026-1526

The undici WebSocket client is vulnerable to a denial-of-service attack via unbounded memory consumption during permessage-deflate decompression. When a WebSocket connection negotiates the permessage-deflate extension, the client decompresses incoming compressed frames without enforcing any limit...

CVE-2026-1526

The undici WebSocket client is vulnerable to a denial-of-service attack via unbounded memory consumption during permessage-deflate decompression. When a WebSocket connection negotiates the permessage-deflate extension, the client decompresses incoming compressed frames without enforcing any limit...

UBUNTU-CVE-2026-2229

ImpactThe undici WebSocket client is vulnerable to a denial-of-service attack due to improper validation of the servermaxwindowbits parameter in the permessage-deflate extension. When a WebSocket client connects to a server, it automatically advertises support for permessage-deflate compression. ...

UBUNTU-CVE-2026-1526

The undici WebSocket client is vulnerable to a denial-of-service attack via unbounded memory consumption during permessage-deflate decompression. When a WebSocket connection negotiates the permessage-deflate extension, the client decompresses incoming compressed frames without enforcing any limit...

CVE-2026-2229

ImpactThe undici WebSocket client is vulnerable to a denial-of-service attack due to improper validation of the servermaxwindowbits parameter in the permessage-deflate extension. When a WebSocket client connects to a server, it automatically advertises support for permessage-deflate compression. ...

CVE-2026-2229

The CVE affects the undici WebSocket client. It arises from improper validation of the server_max_window_bits parameter in the permessage-deflate extension: isValidClientWindowBits() only checks ASCII digits and not the 8–15 range, and createInflateRaw() is not wrapped in a try-catch. A malicious...

CVE-2026-2229 undici is vulnerable to Unhandled Exception in undici WebSocket Client Due to Invalid server_max_window_bits Validation

ImpactThe undici WebSocket client is vulnerable to a denial-of-service attack due to improper validation of the servermaxwindowbits parameter in the permessage-deflate extension. When a WebSocket client connects to a server, it automatically advertises support for permessage-deflate compression. ...

CVE-2026-2229 undici is vulnerable to Unhandled Exception in undici WebSocket Client Due to Invalid server_max_window_bits Validation

ImpactThe undici WebSocket client is vulnerable to a denial-of-service attack due to improper validation of the servermaxwindowbits parameter in the permessage-deflate extension. When a WebSocket client connects to a server, it automatically advertises support for permessage-deflate compression. ...

CVE-2026-2229

ImpactThe undici WebSocket client is vulnerable to a denial-of-service attack due to improper validation of the servermaxwindowbits parameter in the permessage-deflate extension. When a WebSocket client connects to a server, it automatically advertises support for permessage-deflate compression. ...