SecPod Labs
Security Research
In-depth CVE write-ups, vulnerability analysis, and security intelligence from the SecPod Research team.
Open Inside CVE-2026-55200: How a Missing Bounds Check in libssh2 Becomes Remote Code Execution
CVE Research
Inside CVE-2026-55200: How a Missing Bounds Check in libssh2 Becomes Remote Code Execution
A malicious SSH server can corrupt heap memory on any client using libssh2, before authentication and without any user interaction. This blog walks through the exact arithmetic behind the bug, why it lives in ssh2_transport_read(), how the exploitation path works conceptually, and what to check in your own environment.
