CVE-2026-55200 – libssh2 – Out-of-Bounds Write via Unchecked packet_length in transport.c

CVE ID :CVE-2026-55200

Published : June 17, 2026, 7:03 p.m. | 39 minutes ago

Description :libssh2 through 1.11.1, fixed in commit 7acf3df 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.

Severity: 9.2 | CRITICAL

Visit the link for more details, such as CVSS details, affected products, timeline, and more…