CVE-2026-0967

LOW 2.2

Libssh: libssh: denial of service via inefficient regular expression processing

CVSS Score

2.2

EPSS Score

0.1%

EPSS Percentile

24th

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.

CWE	CWE-1333
Vendor	red hat
Product	red hat enterprise linux 10
Published	Mar 26, 2026
Last Updated	Apr 13, 2026

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CVSS v3 Breakdown

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

Affected Versions

Red Hat / Red Hat Enterprise Linux 10

All versions affected

Red Hat / Red Hat Enterprise Linux 6

All versions affected

Red Hat / Red Hat Enterprise Linux 7

All versions affected

Red Hat / Red Hat Enterprise Linux 8

All versions affected

Red Hat / Red Hat Enterprise Linux 9

All versions affected

Red Hat / Red Hat Hardened Images

All versions affected

Red Hat / Red Hat OpenShift Container Platform 4

All versions affected

References

NVD ↗ CVE.org ↗ EPSS Data ↗

access.redhat.com: https://access.redhat.com/security/cve/CVE-2026-0967 bugzilla.redhat.com: https://bugzilla.redhat.com/show_bug.cgi?id=2436981 libssh.org: https://www.libssh.org/2026/02/10/libssh-0-12-0-and-0-11-4-security-releases/

Credits

Red Hat would like to thank Jakub Jelen (libssh) and Kang Yang for reporting this issue.