Is CVE-2026-59847 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-59847?

CVE-2026-59847 has a CVSS v3 severity of MEDIUM (5.9).

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CVE-2026-59847

Description

A flaw was found in libssh. Incorrect AES-GCM finalization checks in builds using the OpenSSL backend can effectively remove integrity protection, allowing an in-path attacker to modify plaintext on the wire without detection.