Vulnerability in Libssh
CVE-2026-0967
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…
Vulnerability class: ReDoS (Regular Expression Denial of Service)
EPSS: 0.000 (11.1th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.
Affected products
- Libssh
- Red Hat Enterprise Linux 10 — versions 0:0.12.0-2.el10
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9 — versions 0:0.10.4-18.el9
- Red Hat Hardened Images
- Red Hat Openshift Container Platform 4
- Redhat Enterprise_linux — versions 9.0, 10.0
Weakness classification (CWE)
References
- secalert@redhat.com (x_refsource_REDHAT, Third Party Advisory, vdb-entry)
- secalert@redhat.com (x_refsource_REDHAT, issue-tracking, Third Party Advisory)
- secalert@redhat.com (Release Notes)
- secalert@redhat.com (x_refsource_REDHAT, vendor-advisory)
- secalert@redhat.com (x_refsource_REDHAT, vendor-advisory)
Frequently asked questions
- What is CVE-2026-0967?
- CVE-2026-0967 is a medium-severity vulnerability in Libssh, classified under Inefficient Regular Expression Complexity. CVSS score: 5.5/10. Published 2026-03-26.
- How severe is CVE-2026-0967?
- Medium severity. CVSS v3 base score is 5.5 out of 10.