https://seclists.org/oss-sec/2026/q2/1010: libssh2: CVE-2026-55200 (critical), CVE-2025-15661 (high), CVE-2026-55199 (high)
Published Jun 23, 2026
·Updated
Affected Software
1 affected component
libssh2 libssh2<=1.11.1
Frequently Asked Questions
1
What is the severity of CVE-2026-55200?
CVE-2026-55200 has been rated as critical, indicating it poses a significant risk to systems using libssh2.
2
How do I fix CVE-2026-55200?
To fix CVE-2026-55200, update libssh2 to the latest patched version provided by the maintainers.
3
What are the potential impacts of CVE-2026-55200?
CVE-2026-55200 could allow unauthorized access or manipulation of secure shell connections, compromising system integrity.
4
Is CVE-2025-15661 related to CVE-2026-55200?
Yes, CVE-2025-15661 is a high severity vulnerability identified in the same libssh2 library that may also require attention.
5
How can I determine if my system is affected by CVE-2026-55200?
You can determine if your system is affected by checking the version of libssh2 installed and comparing it against the fixed versions released by the developers.