Stack-based buffer overflow in libssh - CVE-2026-15370
Published: July 27, 2026
Vulnerability identifier: #VU139525
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-15370
CWE-ID: CWE-121
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: libssh
Affected software:
libssh
libssh
Detailed vulnerability description
The vulnerability allows a local user to execute arbitrary code.
The vulnerability exists due to stack-based buffer overflow in the sftp server longname field construction when listing an attacker-controlled directory with long filenames. A local user can cause a user to list a crafted directory to execute arbitrary code.
User interaction is required to list files in an attacker-controlled directory on a filesystem that allows long filenames.
How to mitigate CVE-2026-15370
Install security update from vendor's website.