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CVE-2026-59847

Libssh: libssh: integrity downgrade via openssl aes-gcm tag verification

Published: Jul 21, 2026Updated: Jul 30, 2026 Sources: CVE List NVDCWE-1310
5.9MEDIUM
NVD MITRE
EPSS Score
0.3%
Top 77.3%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
OpenVAS

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:HPR:NUI:NS:UC:NI:HA:N
Exploitability
AV:NAttack Vector
Network
AC:HAttack Complexity
High
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:HIntegrity
High
A:NAvailability
None
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Weaknesses

CWE-1310

Affected Products

Red Hat
commercial·USaka redhat
hardened imagesOn-prem
Operating Systems / linux-distro
Red Hat Enterprise Linux 10On-premOS
Operating Systems / linux-distro
Red Hat Hardened ImagesOn-premOS
Operating Systems / linux-distro
libssh
oss-projectaka libssh2 (related, sometimes confused)
libsshLibrary
OSS Libraries / generic-library
and 3 more affected products View all →

Exploitability

Official Patch Available
Workaround Available
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References

https://access.redhat.com/errata/RHSA-2026:42922
access.redhat.com
https://access.redhat.com/security/cve/CVE-2026-59847
access.redhat.com
https://bugzilla.redhat.com/show_bug.cgi?id=2498180
bugzilla.redhat.com

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