CVE-2026-0967
MEDIUMLibssh: libssh: denial of service via inefficient regular expression processing
Title source: cnaDescription
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.
Scores
CVSS v3
5.5
EPSS
0.0003
EPSS Percentile
8.5%
Attack Vector
LOCAL
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
partial
Details
CWE
CWE-1333
Status
published
Products (10)
libssh/libssh
< 0.11.3
Red Hat/Red Hat Enterprise Linux 10
Red Hat/Red Hat Enterprise Linux 6
Red Hat/Red Hat Enterprise Linux 7
Red Hat/Red Hat Enterprise Linux 8
Red Hat/Red Hat Enterprise Linux 9
Red Hat/Red Hat Hardened Images
Red Hat/Red Hat OpenShift Container Platform 4
redhat/enterprise_linux
9.0
redhat/enterprise_linux
10.0
Published
Mar 26, 2026
Tracked Since
Mar 27, 2026