CVE-2026-58050: exploitation status and patch state
CVE-2026-58050 · CVSS 7.0 HIGH · EPSS 1%
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 the multiplication overflows to an undersized buffer. A malicious SSH server can then drive the attribute-parsing loop to write past the allocation, causing a heap buffer overflow in a connecting libssh2 client.
Is CVE-2026-58050 exploited?
Not in the CISA KEV catalog.
EPSS puts exploitation in the next 30 days at 1%.
Public exploit code: none found in monitored sources.