CVE-2026-59847
Medium
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.
SeverityMedium
CVSS5.9
Exploit probability—
Product
Libssh
PublishedJul 21, 2026
First seenJul 21, 2026
Weakness typeCWE-253CWE-253
How to fix
Update
- libssh libssh0.11.5 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| libssh libssh | 0.9.0 ≤ v < 0.11.5, 0.12.0 | 0.11.5 |
| redhat hardened_images | No range specified | — |
| redhat enterprise_linux | 8.0, 9.0, 10.0 | — |
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