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CVE-2026-58050

8.3 high SSVC exploitation: none Analyzed
NVD · CVE.org

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.

Fix

Nothing published yet: no patch, vendor advisory or mitigation reference on NVD, no vendor advisory in the News for this CVE, not in CISA's KEV, no fixed package version. BaselineWatch does not guess at one.

Change history 1

  1. First seenCVSS 8.3 · libssh2NVD modified 2026-10-25 17:10

Affected (CPE criteria) 1

  • cpe:2.3:a:libssh2:libssh2:*:*:*:*:*:*:*:*

References 3