openssl: OpenSSL TLS 1.3 server may choose unexpected key agreement group

A key group selection preference flaw has been discovered in OpenSSL. An OpenSSL TLS 1.3 server may fail to negotiate the expected preferred key exchange group when its key exchange group configuration includes the default by using the "DEFAULT" keyword. A less preferred key exchange may be used...

Linux Distros Unpatched Vulnerability : CVE-2026-55199

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 1762685, contains a pre-authentication denial of service vulnerability in the SSHMSGEXTINFO handler in src/packet.c that...

CVE-2026-55199 libssh2 - Pre-Authentication DoS via SSH_MSG_EXT_INFO Handler

libssh2 through 1.11.1, fixed in commit 1762685, contains a pre-authentication denial of service vulnerability in the SSHMSGEXTINFO handler in src/packet.c that allows a malicious SSH server to cause a client CPU exhaustion loop by sending a crafted extension count value. A malicious server can s...

CVE-2026-55199

libssh2 through 1.11.1, fixed in commit 1762685, contains a pre-authentication denial of service vulnerability in the SSHMSGEXTINFO handler in src/packet.c that allows a malicious SSH server to cause a client CPU exhaustion loop by sending a crafted extension count value. A malicious server can s...

EUVD-2026-37782

libssh2 through 1.11.1, fixed in commit 1762685, contains a pre-authentication denial of service vulnerability in the SSHMSGEXTINFO handler in src/packet.c that allows a malicious SSH server to cause a client CPU exhaustion loop by sending a crafted extension count value. A malicious server can s...

CVE-2026-55199

CVE-2026-55199 affects libssh2 up to version 1.11.1. The vulnerability lies in the SSH_MSG_EXT_INFO handler (src/packet.c), where return values from _libssh2_get_string() are unchecked. During key exchange, a malicious SSH server can set nr_extensions to 0xFFFFFFFF, causing the client to spin in ...

PT-2026-50527

Name of the Vulnerable Software and Affected Versions libssh2 versions prior to 1.11.1 Description A pre-authentication denial of service issue exists in the SSH MSG EXT INFO handler within src/packet.c. A malicious SSH server can trigger a CPU exhaustion loop on the client by sending a crafted...

gnutls: gnutls: Information disclosure via heap overread in RSA key exchange

A flaw was found in libgnutls. A remote attacker, by sending an extremely short premaster secret during an RSA key exchange to a server using an RSA key backed by a PKCS11 token, could trigger a short heap overread. This memory corruption vulnerability could lead to information disclosure...

Check Point Gaia Operating System (sk185033)

The version of Gaia Operating System installed on the remote host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the sk185033 advisory. - A logic flow weakness in Remote Access and Mobile Access certificate validation in deprecated IKEv1 key exchange...

GHSA-4R3C-5HPG-58QR Russh SSH message fields were decoded through allocation-first parsers before field-specific bounds

SSH message fields were decoded through allocation-first parsers before field-specific bounds Summary Several russh client and server message handlers decoded attacker-controlled SSH strings, name-lists, and byte fields into owned allocations before applying field-specific bounds. A remote SSH pe...

openssl: FFC-DH Peer Validation Uses Attacker-Supplied q

A flaw was found in OpenSSL. A malicious peer can exploit this vulnerability by presenting a specially crafted DHX X9.42 peer key. Due to improper validation of the peer key's subgroup membership, an attacker can recover the victim's private key after a small number of key exchange attempts. This...

RLSA-2026:24367 Important: bind security update

The Berkeley Internet Name Domain BIND is an implementation of the Domain Name System DNS protocols. BIND includes a DNS server named; a resolver library routines for applications to use when interfacing with DNS; and tools for verifying that the DNS server is operating correctly. Security Fixes:...

WatchGuard FireboxV LDAP Race Condition

WatchGuard FireboxV with firmware version 12.11.6 Build B728370 suffers from a race condition in rscryptosetupldapserver libpkicli.so that allows two concurrently-processed IKEv1 Aggressive Mode packets to trigger a double-free and use-after-Free on the global LDAP connection handle. The research...

VMware Spring Web Services 加密问题漏洞

VMware Spring Web Services is a SOAP web service development framework provided by the American company VMware. There are vulnerabilities related to encryption in VMware Spring Web Services versions 5.0.0 to 5.0.1, 4.1.0 to 4.1.3, 4.0.0 to 4.0.18, and 3.1.0 to 3.1.8. These vulnerabilities stem fr...

CVE-2026-50751

A logic flow weakness in Remote Access and Mobile Access certificate validation in deprecated IKEv1 key exchange allows an unauthenticated remote attacker to bypass user authentication and establish a remote access VPN connection without a valid user password...

CVE-2026-50752

A weakness in the certificate validation logic of the deprecated IKEv1 key exchange may allow an unauthenticated attacker positioned as a man-in-the-middle to bypass certificate validation in VPN site-to-site connections that use certificate-based authentication. Successful exploitation could all...

CVE-2026-50751

A logic flow weakness in Remote Access and Mobile Access certificate validation in deprecated IKEv1 key exchange allows an unauthenticated remote attacker to bypass user authentication and establish a remote access VPN connection without a valid user password...

CVE-2026-50751 User Authentication Bypass in VPN Remote Access and Mobile Access

A logic flow weakness in Remote Access and Mobile Access certificate validation in deprecated IKEv1 key exchange allows an unauthenticated remote attacker to bypass user authentication and establish a remote access VPN connection without a valid user password...

EUVD-2026-35047

A logic flow weakness in Remote Access and Mobile Access certificate validation in deprecated IKEv1 key exchange allows an unauthenticated remote attacker to bypass user authentication and establish a remote access VPN connection without a valid user password...

CVE-2026-50751

A logic flow weakness in Remote Access and Mobile Access certificate validation in deprecated IKEv1 key exchange allows an unauthenticated remote attacker to bypass user authentication and establish a remote access VPN connection without a valid user password...