Astra Linux – Vulnerability in libsoup3

A flaw was discovered in libsoup’s SoupServer. A remote attacker could exploit a use-after-free vulnerability, where the soupserverdisconnect function releases connection objects prematurely, even if a TLS handshake is still pending. If the handshake completes after the connection object has been...

Astra Linux – Vulnerability in Linux 6.12

In the Linux kernel, the following vulnerability has been resolved: net/handshake: The function handshakereqsubmit replaces sk-skdestruct, but it never restores it when submission fails before the request is hashed. As a result, handshakeskdestruct returns early, and the original destructor never...

crypto/tls: golang: Go crypto/tls: Denial of Service via multiple TLS 1.3 key update messages

A flaw was found in the crypto/tls package within the Go golang standard library, specifically affecting TLS 1.3 connections. A remote attacker can exploit this vulnerability by sending multiple key update messages in a single record after the handshake. This can cause the connection to deadlock,...

PT-2026-52176

Name of the Vulnerable Software and Affected Versions Drupal Salesforce Suite versions 0.0.0 through 5.1.3 Description A Cross-Site Request Forgery CSRF issue exists where the software fails to properly validate the OAuth handshake during interactive authentication. This allows an attacker to...

Salesforce Suite - Moderately critical - Cross-site request forgery - SA-CONTRIB-2026-063

The Salesforce Suite of modules integrates Drupal with Salesforce. The Salesforce module does not properly validate the OAuth handshake during interactive authentication, allowing an attacker to hijack the authorization token and bind the site to an attacker's Salesforce account. This vulnerabili...

CVE-2026-55199

A vulnerability in libssh2 allows a malicious SSH server to freeze connected clients during the handshake process. By sending a malformed packet, the server triggers a loop that exhausts the client's CPU, resulting in a denial of service. Mitigation To mitigate this issue, ensure your libssh2...

CVE-2026-53622

CVE-2026-53622 concerns Traefik’s HTTP/3 (QUIC) TLS configuration selection. When HTTP/3 is enabled, the TLS handshake uses an exact, case-sensitive lookup of the SNI to choose a TLS config, which fails to match wildcard hosts or mixed-case hostnames. If a router enforces mTLS via TLSOptions and ...

CVE-2026-48491 Traefik: SNICheck ignores wildcard TLSOptions mappings, allowing domain-fronted mTLS bypass

Traefik is an HTTP reverse proxy and load balancer. From 3.7.0 until 3.7.3, there is a high severity vulnerability in Traefik's domain-fronting protection SNICheck that allows an unauthenticated client to bypass mutual TLS enforced through wildcard router TLSOptions. When a router uses a wildcard...

CVE-2026-55517

Deno is a JavaScript, TypeScript, and WebAssembly runtime. Prior to 2.7.5, a Deno program that opens a client WebSocket connection could be crashed by the remote server. While handling the WebSocket handshake response, Deno parsed the Sec-WebSocket-Protocol and Sec-WebSocket-Extensions response...

CVE-2026-55517 Deno: Denial of service via non-ASCII bytes in WebSocket response headers

Deno is a JavaScript, TypeScript, and WebAssembly runtime. Prior to 2.7.5, a Deno program that opens a client WebSocket connection could be crashed by the remote server. While handling the WebSocket handshake response, Deno parsed the Sec-WebSocket-Protocol and Sec-WebSocket-Extensions response...

CVE-2026-55517

Deno is a JavaScript, TypeScript, and WebAssembly runtime. Prior to 2.7.5, a Deno program that opens a client WebSocket connection could be crashed by the remote server. While handling the WebSocket handshake response, Deno parsed the Sec-WebSocket-Protocol and Sec-WebSocket-Extensions response...

CVE-2026-55517

CVE-2026-55517 affects Deno prior to 2.7.5, where a client WebSocket handshake could crash the process if the server returned non-ASCII bytes in Sec-WebSocket-Protocol or Sec-WebSocket-Extensions headers. The root cause is parsing those headers as ASCII strings, triggering a panic when non-printa...

GHSA-XP79-5MX3-JX52 Gogs has Unauthenticated Asymmetric Denial of Service (DoS) via SSH Handshake Stall (File Descriptor Exhaustion)

The Gogs built-in Go SSH server is vulnerable to an unauthenticated, asymmetric Denial of Service DoS attack. The application accepts inbound TCP connections and passes them to golang.org/x/crypto/ssh.NewServerConn inside a new goroutine without enforcing any read/write deadlines on the underlyin...

Gogs has Unauthenticated Asymmetric Denial of Service (DoS) via SSH Handshake Stall (File Descriptor Exhaustion)

The Gogs built-in Go SSH server is vulnerable to an unauthenticated, asymmetric Denial of Service DoS attack. The application accepts inbound TCP connections and passes them to golang.org/x/crypto/ssh.NewServerConn inside a new goroutine without enforcing any read/write deadlines on the underlyin...

JLSEC-2026-622 Predictable WebSocket masking key and handshake nonce in HTTP.jl client

Description The WebSocket client masking key wssendframe! and the Sec-WebSocket-Key handshake nonce wsrandomhandshakekey were generated with randUInt8, n, which draws from the task-local Xoshiro256++ PRNG. Xoshiro is not cryptographically secure: its internal state can be recovered from a short r...

PT-2026-51632

Name of the Vulnerable Software and Affected Versions Gogs versions prior to 0.14.3 Description The built-in Go SSH server in Gogs is subject to an unauthenticated, asymmetric Denial of Service DoS attack. The application accepts inbound TCP connections and passes them to the ssh.NewServerConn...

OPENSUSE-SU-2026:21145-1 Security update for mbedtls-2

This update for mbedtls-2 fixes the following issues: Changes in mbedtls-2: - Enable SRTP and DTLS protocols needed by some software. - Update to version 2.28.10: Default behavior changes In TLS clients, if mbedtlssslsethostname has not been called, mbedtlssslhandshake now fails with...

Astra Linux – Vulnerability in mbedtls

A issue was discovered in Mbed TLS 3.5.1. There is a persistent handshake denial if a client sends a TLS 1.3 ClientHello without extensions...

netty-handler: Netty: Denial of Service due to eager buffer allocation in TLS handshake

A flaw was found in Netty, a network application framework. A remote attacker can exploit this vulnerability by sending a crafted TLS Transport Layer Security ClientHello message. This can lead to an eager allocation of a large memory buffer, causing a Denial of Service DoS due to excessive memor...

GHSA-X2QC-CMH9-F4HF Deno: Denial of service via non-ASCII bytes in WebSocket response headers

Summary A Deno program that opens a client WebSocket connection could be crashed by the remote server. While handling the WebSocket handshake response, Deno parsed the Sec-WebSocket-Protocol and Sec-WebSocket-Extensions response headers in a way that assumed their bytes were always printable ASCI...