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CVE-2026-0966

Libssh vulnerability

8.2 HIGHEPSS 0.58%
  1. Published26 Mar 2026

Description

A flaw was found in libssh. The API function `ssh_get_hexa()` is vulnerable to a denial of service when processing zero-length input. This can be exploited remotely by an attacker during GSSAPI (Generic Security Service Application Program Interface) authentication if the server's logging verbosity is set to `SSH_LOG_PACKET (3)` or higher. Successful exploitation could lead to a self-Denial of Service of the per-connection daemon process.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityNone
IntegrityLow
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H

Affected products

Libssh< 0.11.4
Redhat Hardened Imagesall versions
Redhat Openshift Container Platform4.0
Redhat Enterprise Linux10.0 · 8.0 · 9.0

Remediation

Fixed in
Libssh≥ 0.11.4

References

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Frequently asked

Is CVE-2026-0966 being actively exploited?

CVE-2026-0966 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.58%.

How severe is CVE-2026-0966?

CVE-2026-0966 has a CVSS 3.1 base score of 8.2, rated high. EPSS estimates a 0.58% probability of exploitation.

Which products are affected by CVE-2026-0966?

Affected products include Libssh, Redhat Hardened Images, Redhat Openshift Container Platform, Redhat Enterprise Linux.

How do I fix CVE-2026-0966?

Upgrade affected software to a fixed version, for example Libssh 0.11.4 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-0966 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.