CVE-2026-39804

A flaw was found in bandit. An unauthenticated attacker who can open a WebSocket connection can exploit a vulnerability when WebSocket permessage-deflate compression is enabled. This flaw allows for memory exhaustion by sending a highly compressed frame that, when decompressed, forces large memor...

GHSA-FRH3-6PV6-RC8J Bandit's unbounded WebSocket inflate causes BEAM OOM with a single frame

Summary When a Bandit-fronted server has explicitly enabled WebSocket permessage-deflate compress: true, an unauthenticated client can OOM the BEAM with a single 6 MiB WebSocket frame. Bandit's inflate step has no output-size cap, so a small high-ratio compressed frame e.g. zeros, 1024:1 ratio...

EUVD-2026-26711

Bandit's unbounded WebSocket inflate causes BEAM OOM with a single frame...

Bandit's unbounded WebSocket inflate causes BEAM OOM with a single frame

Summary When a Bandit-fronted server has explicitly enabled WebSocket permessage-deflate compress: true, an unauthenticated client can OOM the BEAM with a single 6 MiB WebSocket frame. Bandit's inflate step has no output-size cap, so a small high-ratio compressed frame e.g. zeros, 1024:1 ratio...

CVE-2026-39804

Allocation of Resources Without Limits or Throttling vulnerability in mtrudel bandit allows unauthenticated remote denial of service via memory exhaustion when WebSocket permessage-deflate compression is enabled. 'Elixir.Bandit.WebSocket.PerMessageDeflate':inflate/2 in...

CVE-2026-39804 WebSocket permessage-deflate inflate has no output-size cap in bandit

Allocation of Resources Without Limits or Throttling vulnerability in mtrudel bandit allows unauthenticated remote denial of service via memory exhaustion when WebSocket permessage-deflate compression is enabled. 'Elixir.Bandit.WebSocket.PerMessageDeflate':inflate/2 in...

EEF-CVE-2026-39804 WebSocket permessage-deflate inflate has no output-size cap in bandit

Summary Allocation of Resources Without Limits or Throttling vulnerability in mtrudel bandit allows unauthenticated remote denial of service via memory exhaustion when WebSocket permessage-deflate compression is enabled. 'Elixir.Bandit.WebSocket.PerMessageDeflate':inflate/2 in...

CVE-2026-39804

Allocation of Resources Without Limits or Throttling vulnerability in mtrudel bandit allows unauthenticated remote denial of service via memory exhaustion when WebSocket permessage-deflate compression is enabled. 'Elixir.Bandit.WebSocket.PerMessageDeflate':inflate/2 in...

CVE-2026-39804

The vulnerability CVE-2026-39804 affects Bandit (Elixir) WebSocket permessage-deflate handling. The function Elixir.Bandit.WebSocket.PerMessageDeflate.inflate/2 calls :zlib.inflate/2 without an output size cap and materializes the full decompressed payload into a single binary, while max_frame_si...

Bandit 安全漏洞

Bandit is a high-performance HTTP and WebSocket server from the individual developer Mat Trudel. A security vulnerability exists in Bandit versions 0.5.9 through 1.11.0 and earlier, which stems from an unrestricted resource allocation when WebSocket permessage-deflate compression is enabled, whic...

Node.js Module Undici < 6.24.0 / 7.x < 7.24.0 Multiple Vulnerabilities

The nodejs module Undici detected on the host is prior to version 6.24.0 or version 7.x prior to 7.24.0. It is, therefore, affected by multiple vulnerabilities : - A flaw exists due to allowing duplicate HTTP Content-Length headers when provided in an array with case-variant names. An...

AlmaLinux 10 : nodejs24 (ALSA-2026:7675)

The remote AlmaLinux 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the ALSA-2026:7675 advisory. nodejs: Nodejs denial of service CVE-2026-21637 brace-expansion: brace-expansion: Denial of Service via unbounded brace range expansion CVE-2026-25547...

undici: undici: Denial of Service via unbounded memory consumption during WebSocket permessage-deflate decompression

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...

undici: Undici: Denial of Service via invalid WebSocket permessage-deflate extension parameter

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,...

undici: Undici: Denial of Service via invalid WebSocket permessage-deflate extension parameter

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,...

undici: undici: Denial of Service via unbounded memory consumption during WebSocket permessage-deflate decompression

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...

undici: undici: Denial of Service via unbounded memory consumption during WebSocket permessage-deflate decompression

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...

undici: Undici: Denial of Service via invalid WebSocket permessage-deflate extension parameter

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,...

SUSE 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...

SUSE 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. ...