CVE-2026-0966

Name: CVE-2026-0966
Creator: NVD / NIST
Published: 2026-03-26T21:17:00.783+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.2/10EPSS 0.58%

Last modified Jun 17, 2026

CVE-2026-0966 is a high-severity vulnerability rated 8.2/10 on the CVSS scale. A flaw was found in libssh. The API function `ssh_get_hexa()` is vulnerable to a denial of service when processing zero-length input. EPSS estimates a 0.58% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

8.2/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H

CVSS 3.0

6.5/10

CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H

EPSS Probability

0.58%

43.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-124

Affected Software

Vendor	Product	Versions
Libssh	Libssh	< 0.11.4
Redhat	Hardened Images	All versions
Redhat	Openshift Container Platform	4.0
Redhat	Enterprise Linux	8.0
Redhat	Enterprise Linux	9.0
Redhat	Enterprise Linux	10.0

References

https://access.redhat.com/errata/RHSA-2026:18160
https://access.redhat.com/errata/RHSA-2026:18683
https://access.redhat.com/errata/RHSA-2026:7067Vendor Advisory
https://access.redhat.com/security/cve/CVE-2026-0966Mitigation, Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2433121Issue Tracking, Vendor Advisory
https://www.libssh.org/2026/02/10/libssh-0-12-0-and-0-11-4-security-releases/Release Notes

Timeline

Published: Mar 26, 2026
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2026-0966?

How severe is CVE-2026-0966?

CVE-2026-0966 has a CVSS score of 8.2/10 (HIGH severity). The EPSS model estimates a 0.58% probability of exploitation in the next 30 days.

How do I fix CVE-2026-0966?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-0966?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST