CVE-2026-102467

In Eclipse Vert.x versions 4.0.0, 4.5.34 or 5.0.0,5.0.12 or 5.1.0,5.1.9 or 5.2.0, 5.2.0, the WebSocket implementation does not define a maximum number of bytes allocation when decompressing frames or messages. This can be used to implement DDOS attacks with a zip bomb. The impacted component is...

CVE-2026-109855

The undici HTTP client library for Node.js (versions 8.11.0 and 8.11.1 ) contains a vulnerability in its experimental WebSocket client . When HTTP/2 is enabled, a failed WebSocket handshake causes the request to be marked as completed prematurely, making the abort a no-op and leaving the underlyi...

CVE-2026-109855 undici WebSocket client vulnerable to Denial of Service via failed HTTP/2 handshake

undici is an HTTP client library for Node.js. In versions 8.11.0 and 8.11.1, its experimental WebSocket client, which is enabled by default when HTTP/2 is allowed, mishandles a failed WebSocket handshake over HTTP/2: the request is already marked completed, so the abort becomes a no-op and the...

EUVD-2026-101959

undici is an HTTP client library for Node.js. In versions 8.11.0 and 8.11.1, its experimental WebSocket client, which is enabled by default when HTTP/2 is allowed, mishandles a failed WebSocket handshake over HTTP/2: the request is already marked completed, so the abort becomes a no-op and the...

CVE-2026-109855 undici WebSocket client vulnerable to Denial of Service via failed HTTP/2 handshake

undici is an HTTP client library for Node.js. In versions 8.11.0 and 8.11.1, its experimental WebSocket client, which is enabled by default when HTTP/2 is allowed, mishandles a failed WebSocket handshake over HTTP/2: the request is already marked completed, so the abort becomes a no-op and the...

CVE-2026-102467

The io.vertx:vertx-core component in Eclipse Vert.x versions [4.0.0, 4.5.34], [5.0.0, 5.0.12], [5.1.0, 5.1.9], and [5.2.0, 5.2.0] contains a vulnerability in its WebSocket implementation . The root cause is a failure to define a maximum number of bytes allocation when decompressing frames or mess...

CVE-2026-102467

In Eclipse Vert.x versions 4.0.0, 4.5.34 or 5.0.0,5.0.12 or 5.1.0,5.1.9 or 5.2.0, 5.2.0, the WebSocket implementation does not define a maximum number of bytes allocation when decompressing frames or messages. This can be used to implement DDOS attacks with a zip bomb. The impacted component is...

EUVD-2026-101929

In Eclipse Vert.x versions 4.0.0, 4.5.34 or 5.0.0,5.0.12 or 5.1.0,5.1.9 or 5.2.0, 5.2.0, the WebSocket implementation does not define a maximum number of bytes allocation when decompressing frames or messages. This can be used to implement DDOS attacks with a zip bomb. The impacted component is...

CVE-2026-102467

In Eclipse Vert.x versions 4.0.0, 4.5.34 or 5.0.0,5.0.12 or 5.1.0,5.1.9 or 5.2.0, 5.2.0, the WebSocket implementation does not define a maximum number of bytes allocation when decompressing frames or messages. This can be used to implement DDOS attacks with a zip bomb. The impacted component is...

libsoup: libsoup: Heap buffer overflow from WebSocket Pong signal type confusion

A flaw was found in libsoup. When handling an incoming WebSocket Pong frame, SoupWebsocketConnection emitted the ::pong signal with a GByteArray pointer even though the signal is declared to pass a GBytes. Applications connecting a handler that follows the documented GBytes API can trigger heap...

libsoup: libsoup: Heap buffer overflow during outgoing permessage-deflate buffer growth

A flaw was found in libsoup. When the permessage-deflate WebSocket extension compresses a very large outgoing message, truncated size calculations used for GByteArray growth could wrap, causing zlib to write past the allocated buffer and resulting in a heap buffer overflow...

Important: Red Hat Security Advisory: libsoup security update

An update for libsoup is now available for Red Hat Enterprise Linux 9. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is available for each vulnerability from t...

libsoup: libsoup: Heap buffer overflow during WebSocket message reassembly

A flaw was found in libsoup. When reassembling fragmented WebSocket messages into a GByteArray, libsoup did not adequately cap total message size against the limits of the underlying buffer type. A remote peer could send fragments that caused size truncation while the implementation still used th...

libsoup: libsoup: Heap buffer overflow during WebSocket receive-buffer growth

A flaw was found in libsoup. When max-incoming-payload-size is unlimited 0, SoupWebsocketConnection could grow its incoming GByteArray based on an attacker-controlled frame length until the length wrapped, causing a heap buffer overflow while reading frame data...

libsoup: libsoup: Heap buffer overflow during WebSocket client-frame masking

A flaw was found in libsoup. When constructing a masked WebSocket client frame for a very large outgoing payload, size values passed to GByteArray allocation APIs could be truncated while the masking routine still used the full length, causing a heap buffer overflow...

CLEANSTART-2026-HS68048 In specific scenarios involving WebSocket handshake redirects to a different origin, the Reactor Netty WebSocket client may leak credentials

Security vulnerability affects the elasticsearch package. In specific scenarios involving WebSocket handshake redirects to a different origin, the Reactor Netty WebSocket client may leak credentials...

CLEANSTART-2026-QG39895 undici's WebSocket client crashes the whole Node

CVE-2026-19534 affects multiple packages. undici's WebSocket client crashes the whole Node. See references for individual vulnerability details...

CLEANSTART-2026-TX86596 undici bundles a WebSocket client whose permessage-deflate size-limit cleanup removes all listeners from the internal zlib inflate stream, including its error listener, while that stream can still ...

CVE-2026-85024 affects multiple packages. undici bundles a WebSocket client whose permessage-deflate size-limit cleanup removes all listeners from the internal zlib inflate stream, including its error listener, while that stream can still emit. See references for individual vulnerability details...

Linux Distros Unpatched Vulnerability : CVE-2026-109855

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - undici is an HTTP client library for Node.js. In versions 8.11.0 and 8.11.1, its experimental WebSocket client, which is enabled by default when HTTP/2 is...

AlmaLinux 9 : nodejs:22 (ALSA-2026:76750)

The remote AlmaLinux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the ALSA-2026:76750 advisory. pacote: Pacote: Denial of Service via crafted spec.rawSpec value in addGitSha function CVE-2026-9496 undici: undici: Denial of Service via unrequested...