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CRITICAL Vulnerabilities

Public PoC Published for libssh2 Client-Side RCE Flaw CVE-2026-55200

Source headline: Public PoC Released for Critical libssh2 CVE-2026-55200 Client-Side SSH Flaw

Threat level Critical
Signal strength 85/100
Source confidence 1 source
Published 4 hours ago

Intelligence Summary

A public proof-of-concept has been released for CVE-2026-55200 in the libssh2 client-side SSH library. The issue can let a malicious or compromised SSH server corrupt memory on clients during connection. Successful exploitation may lead to code execution without any credentials or user interaction. The bug impacts libssh2 releases up to and including 1.11.1. Users of affected versions should update to a fixed release and review SSH client usage exposed to untrusted servers.

Recommended Action

Prioritize immediate review, validate exposure, and patch or mitigate affected systems.

Topics

#proof-of-concept #code-execution #cve-2026-55200 #libssh2 #memory-corruption #ssh
Original reporting The Hacker News Public PoC Released for Critical libssh2 CVE-2026-55200 Client-Side SSH Flaw
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