Integer overflow in Libssh2
CVE-2026-58050
libssh2 through 1.11.1 reads an attacker-controlled 32-bit attribute count from a publickey-subsystem response and uses it in the allocation num_attrs * sizeof(libssh2_publickey_attribute) without bounds checking, so on 32-bit platforms th…
Vulnerability class: Integer Overflow
CVSS v3 metric
CVSS v3 base score 7.0 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:H.
Affected products
- Libssh2 — versions 0
Weakness classification (CWE)
References
- disclosure@vulncheck.com (exploit, third-party-advisory)
- disclosure@vulncheck.com (product)
- disclosure@vulncheck.com (third-party-advisory)
Frequently asked questions
- What is CVE-2026-58050?
- CVE-2026-58050 is a high-severity vulnerability in Libssh2, classified under Integer Overflow or Wraparound. CVSS score: 7.0/10. Published 2026-06-28.
- How severe is CVE-2026-58050?
- High severity. CVSS v3 base score is 7.0 out of 10.