CVE-2026-57497

webtransport-go (a Go implementation of the WebTransport protocol in the quic-go project) is vulnerable to a memory exhaustion attack prior to version 0.11.1 . The function Session.parseNextCapsule() in session.go calls io.ReadAll on the capsule reader, retaining the full declared capsule body in...

CVE-2026-57497 webtransport-go: Memory Exhaustion Attack due to Buffering of Unknown Capsules

webtransport-go is an implementation of the WebTransport protocol. Prior to 0.11.1, Session.parseNextCapsule in session.go skips an unknown WebTransport capsule on the HTTP/3 request stream by calling io.ReadAll on the capsule reader, retaining the complete declared capsule body in memory. A...

EUVD-2026-42312

Socket.IO: Engine.IO WebTransport SID DoS...

Astra Linux – Vulnerability in Chromium

The use of after-free in WebTransport in Google Chrome before version 109.0.5414.119 allowed a remote attacker to potentially exploit heap corruption through a crafted HTML page. Chromium security severity: High...

Astra Linux – Vulnerability in Firefox and Thunderbird

A website configured to initiate a specially crafted WebTransport session could cause the Firefox process to crash, resulting in a denial-of-service condition. This vulnerability affects Firefox 131, Firefox ESR 128.3, Thunderbird 128.3, and Thunderbird 131...

Astra Linux – Vulnerability in Thunderbird, Firefox

It was possible to cause a use-after-free in the content processing side of a WebTransport connection, resulting in a potentially exploitable crash. This vulnerability has been fixed in Firefox 136, Firefox ESR 115.21, Firefox ESR 128.8, Thunderbird 136, and Thunderbird 128.8...

Astra Linux – Vulnerability in Chromium

In Google Chrome, operations outside the bounds were allowed before 127.0.6533.88; this enabled a remote attacker to potentially perform out-of-bounds memory access through a crafted HTML page. Chromium security severity: High...

GO-2026-6099 webtransport-go: Memory Exhaustion Attack due to Buffering of Unknown Capsules in github.com/quic-go/webtransport-go

webtransport-go: Memory Exhaustion Attack due to Buffering of Unknown Capsules in github.com/quic-go/webtransport-go...

Apple iCloud Private Relay Can Expose Real IPs Through WebKit Proxy Bypasses

Cybersecurity researchers have disclosed a security issue with Apple's iCloud Private Relay tool that can expose a user's real IP address. Introduced with iOS 15, iCloud Private Relay employs a dual-hop architecture to ensure users' privacy by routing their Safari web traffic through two relays s...

Allocation of Resources Without Limits or Throttling

Overview Affected versions of this package are vulnerable to Allocation of Resources Without Limits or Throttling in the process that handles unknown WebTransport capsules. An attacker can cause excessive memory allocation by sending a large unknown capsule, resulting in resource exhaustion or...

webtransport-go: Memory Exhaustion Attack due to Buffering of Unknown Capsules

Summary An attacker can cause excessive memory allocation in webtransport-go by sending an unknown WebTransport capsule with a large payload. The implementation skips unknown capsules by reading the entire capsule body into memory, instead of draining it without retaining the data. This can lead ...

GHSA-G35J-M5XG-VH3Q webtransport-go: Memory Exhaustion Attack due to Buffering of Unknown Capsules

Summary An attacker can cause excessive memory allocation in webtransport-go by sending an unknown WebTransport capsule with a large payload. The implementation skips unknown capsules by reading the entire capsule body into memory, instead of draining it without retaining the data. This can lead ...

PT-2026-64438

Name of the Vulnerable Software and Affected Versions webtransport-go affected versions not specified Description An attacker can trigger a denial-of-service DoS by sending an unknown WebTransport capsule with a large payload. The software fails to properly handle unknown capsules by reading the...

CVE-2026-59724

A flaw was found in Engine.IO. When Engine.IO servers have WebTransport enabled, a remote attacker can craft a session ID to resolve an inherited property of the clients object during WebTransport upgrade handling. This can lead to a TypeError, resulting in a denial of service DoS for the server...

CVE-2026-59724

Socket.IO enables bidirectional and low-latency communication for every platform. From 6.5.0 before 6.6.7, Engine.IO servers with WebTransport enabled can resolve a crafted session ID such as proto through an inherited property of the clients object during WebTransport upgrade handling, causing a...

CVE-2026-59724

Socket.IO’s Engine.IO component is affected in versions 6.5.0–6.6.6 when WebTransport is enabled. During a WebTransport upgrade, processing a crafted session ID such as proto on an inherited property of the clients object can trigger a TypeError, leading to a denial of service. The issue has been...

CVE-2026-59724 Socket.IO: Engine.IO WebTransport SID DoS

Socket.IO enables bidirectional and low-latency communication for every platform. From 6.5.0 before 6.6.7, Engine.IO servers with WebTransport enabled can resolve a crafted session ID such as proto through an inherited property of the clients object during WebTransport upgrade handling, causing a...

CVE-2026-59724 Socket.IO: Engine.IO WebTransport SID DoS

Socket.IO enables bidirectional and low-latency communication for every platform. From 6.5.0 before 6.6.7, Engine.IO servers with WebTransport enabled can resolve a crafted session ID such as proto through an inherited property of the clients object during WebTransport upgrade handling, causing a...

PT-2026-56487

Name of the Vulnerable Software and Affected Versions Socket.IO versions 6.5.0 through 6.6.6 Description Engine.IO servers with WebTransport enabled are susceptible to a denial of service. During WebTransport upgrade handling, the server can resolve a crafted session ID, such as proto , through a...

engine.io: Engine.IO: Denial of Service via crafted WebTransport session ID

A flaw was found in Engine.IO. When Engine.IO servers have WebTransport enabled, a remote attacker can craft a session ID to resolve an inherited property of the clients object during WebTransport upgrade handling. This can lead to a TypeError, resulting in a denial of service DoS for the server...