CVE-2026-59646

In Bouncy Castle for Java before 1.85, DTLS handshake reassembler allocates buffer from unchecked 24-bit length. This issue also affects Bouncy Castle for Java LTS before 2.73.12, and Bouncy Castle for Java FIPS BC-FJA before bctls-fips 1.0.24 1.0.X series, 2.0.24 2.0.X series and 2.1.24 2.1.X...

CVE-2026-52856 Wings: Maliciously crafted packet during SFTP connection handshake causes denial of service

Wings is the server control plane for Pterodactyl, a free, open-source game server management panel. Prior to 1.13.0, a malformed packet received during the SFTP connection handshake causes a Go panic. This issue is fixed in version 1.13.0...

USN-8625-1 openssl vulnerability

It was discovered that OpenSSL incorrectly allocated memory buffers in the SSL/TLS state machine when receiving handshake data. A remote attacker could possibly use this issue to cause OpenSSL to consume excessive memory, leading to a denial of service. This issue is known as the "HollowByte"...

Erlang/OTP: public_key: Erlang/OTP public_key: Denial of Service via crafted TLS certificate chains

A flaw was found in Erlang/OTP's publickey application. A remote, unauthenticated attacker can exploit this vulnerability by sending a specially crafted X.509 certificate chain during a Transport Layer Security TLS handshake. This causes the certificate path validation process to consume excessiv...

CVE-2026-59251

Allocation of resources without limits in Erlang/OTP publickey certificate path validation allows a remote unauthenticated attacker to cause denial of service by sending a crafted X.509 certificate chain during the TLS handshake. During RFC 5280 policy processing in publickey:pkixpathvalidation/3...

CVE-2026-55953 TLS 1.2 and DTLS client accepts unoffered anonymous cipher suite, bypassing server authentication

The Erlang/OTP ssl TLS 1.2 and earlier and DTLS client does not verify that the cipher suite selected by the server in ServerHello was among the suites offered by the client in ClientHello. The client-side tlshandshake:hello/5 handler validates the negotiated protocol version and the downgrade...

Linux Distros Unpatched Vulnerability : CVE-2026-66035

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - libssh2 through 1.11.1, fixed in commit 42e33d8, contains a pre-authentication heap buffer overflow vulnerability that allows a malicious SSH server to corrupt...

Heap-based Buffer Overflow

Overview Affected versions of this package are vulnerable to Heap-based Buffer Overflow in the fullpacket function during Encrypt-then-MAC cipher negotiation. An attacker can corrupt heap metadata and potentially achieve arbitrary code execution or cause a denial of service by sending a specially...

CVE-2026-66035 libssh2 Heap Buffer Overflow via ETM Cipher Negotiation

libssh2 through 1.11.1, fixed in commit 42e33d8, contains a pre-authentication heap buffer overflow vulnerability that allows a malicious SSH server to corrupt heap metadata in any connecting client by sending a packet with a packetlength smaller than the cipher's block size during Encrypt-then-M...

SUSE-SU-2026:22752-1 Security update for gstreamer-plugins-bad

This update for gstreamer-plugins-bad fixes the following issues - CVE-2026-12891: unchecked aspectratioidc value used as an array index in the H.266 parser could cause a global out- of-bounds read bsc1268872. - CVE-2026-12892: 1-byte heap out-of-bounds read in H.264 NAL extension slice parser...

CVE-2026-59950 MCP Python SDK: WebSocket server transport does not support Host/Origin validation

The MCP Python SDK, called mcp on PyPI, is a Python implementation of the Model Context Protocol MCP. Prior to 1.28.1, the deprecated mcp.server.websocket.websocketserver transport accepted WebSocket handshakes without applying Host or Origin header validation, leaving no SDK-level way to restric...

crypto/tls: golang: Go crypto/tls: Information disclosure in Encrypted Client Hello

A flaw was found in the crypto/tls package in Go. Handshakes utilizing Encrypted Client Hello ECH could lead to de-anonymization by a passive network observer. This is due to the disclosure of pre-shared key identities within the unencrypted client hello, allowing an attacker to potentially link...

Linux Distros Unpatched Vulnerability : CVE-2026-54891

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - Improper Enforcement of Message Integrity During Transmission in a Communication Channel vulnerability in Erlang/OTP ssl tlsgenconnection module allows a...

CVE-2026-54891

Improper Enforcement of Message Integrity During Transmission in a Communication Channel vulnerability in Erlang/OTP ssl tlsgenconnection module allows a network-positioned attacker to inject unauthenticated plaintext that the TLS client application later treats as authenticated server data. The...

CVE-2026-54891

Improper Enforcement of Message Integrity During Transmission in a Communication Channel vulnerability in Erlang/OTP ssl tlsgenconnection module allows a network-positioned attacker to inject unauthenticated plaintext that the TLS client application later treats as authenticated server data. The...

Allocation of Resources Without Limits or Throttling

Overview github.com/gogs/gogs/internal/ssh is a painless self-hosted Git service Affected versions of this package are vulnerable to Allocation of Resources Without Limits or Throttling through the SSH handshake process. An attacker can exhaust available file descriptors and disrupt legitimate...

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,...

Allocation of Resources Without Limits or Throttling

Overview io.netty:netty-handler is a library that provides an asynchronous event-driven network application framework and tools for rapid development of maintainable high performance and high scalability protocol servers and clients. In other words, Netty is a NIO client server framework which...

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,...

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,...