Veille CVE

Mercredi 17 juin 2026

2 CVE

Critique 0 Élevée 2 Moyenne 0 Faible 0 Non évaluée 0 Exploitées (KEV) Tri : plus récentes « Libssh2 libssh2 » ✕
  1. CVE-2026-55200 8.3 Élevée

    libssh2 · Libssh2 libssh2

    libssh2 1.11.1, fixed in commit 97acf3d, contains an out-of-bounds write vulnerability in ssh2_transport_read() that fails to enforce upper bounds on packet_length field. Remote attackers can send crafted SSH packets with excessively large packet_length values to corrupt heap memory and achieve remote code execution.

  2. CVE-2026-55199 7.5 Élevée

    libssh2 · Libssh2 libssh2

    libssh2 through 1.11.1, fixed in commit 1762685, contains a pre-authentication denial of service vulnerability in the SSH_MSG_EXT_INFO 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 set nr_extensions to 0xFFFFFFFF during key exchange, causing the client to spin in a tight CPU loop for over 60 seconds because return values from _libssh2_get_string() are unchecked and the session timeout does not apply to CPU-bound loops.