CVE-2026-59847
Libssh: libssh: integrity downgrade via openssl aes-gcm tag verification
CVSS Score
5.9
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-253 |
| Vendor | red hat |
| Product | red hat enterprise linux 10 |
| Published | Jul 21, 2026 |
| Last Updated | Sep 1, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
None
Affected Versions
Red Hat / Red Hat Enterprise Linux 10
All versions affected Red Hat / Red Hat Enterprise Linux 8
All versions affected Red Hat / Red Hat Enterprise Linux 8
All versions affected Red Hat / Red Hat Enterprise Linux 9
All versions affected Red Hat / Red Hat Enterprise Linux 9
All versions affected Red Hat / Red Hat Hardened Images
All versions affected References
access.redhat.com: https://access.redhat.com/errata/RHSA-2026:42922 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:55855 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:62217 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:62218 access.redhat.com: https://access.redhat.com/security/cve/CVE-2026-59847 bugzilla.redhat.com: https://bugzilla.redhat.com/show_bug.cgi?id=2498180
Credits
Red Hat would like to thank Ben Smyth for reporting this issue.