CVE-2026-0967

Name: CVE-2026-0967
Creator: NVD / NIST
Published: 2026-03-26T21:17:00.97+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.5/10EPSS 0.22%

Last modified Jun 17, 2026

CVE-2026-0967 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. A flaw was found in libssh. A remote attacker, by controlling client configuration files or known_hosts files, could craft specific hostnames that when processed by the `match_pattern()` function can lead to inefficient regular expression backtracking. EPSS estimates a 0.22% chance of exploitation in the next 30 days.

Description

A flaw was found in libssh. A remote attacker, by controlling client configuration files or known_hosts files, could craft specific hostnames that when processed by the `match_pattern()` function can lead to inefficient regular expression backtracking. This can cause timeouts and resource exhaustion, resulting in a Denial of Service (DoS) for the client.

Metrics

CVSS 3.1

5.5/10

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

CVSS 3.0

2.2/10

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

EPSS Probability

0.22%

12.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-1333

Affected Software

Vendor	Product	Versions
Libssh	Libssh	<= 0.11.3
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/security/cve/CVE-2026-0967Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2436981Third Party 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-2026-0967?

How severe is CVE-2026-0967?

CVE-2026-0967 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 0.22% probability of exploitation in the next 30 days.

How do I fix CVE-2026-0967?

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-2026-0967?

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

Scan your code now

Source: NVD / NIST