CVEvulnerability
CVE-2026-0967
5.5 MEDIUM
Official page ↗
- Status
- Modified
- Published
- 2026-03-26
- Last modified
- 2026-09-01
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 5.5 MEDIUM — CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
- CVSS 3.0 ([email protected])
- 2.2 LOW — CVSS:3.0/AV:L/AC:H/PR:L/UI:R/S:U/C:N/I:N/A:L
- Weaknesses
- CWE-1333
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.
Affected configurations
• libssh libssh (<= 0.11.3)
• redhat enterprise linux 9.0
• redhat enterprise linux 10.0
Related
Weakness · CWE (1)
- CWE-1333 Inefficient Regular Expression Complexity weakness
References
- https://access.redhat.com/errata/RHSA-2026:18160 access.redhat.com
- https://access.redhat.com/errata/RHSA-2026:18683 access.redhat.com
- https://access.redhat.com/security/cve/CVE-2026-0967 Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2436981 Third Party Advisory
- https://www.libssh.org/2026/02/10/libssh-0-12-0-and-0-11-4-security-releases/ Release Notes