CVE-2026-0967
Medium
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.
SeverityMedium
CVSS5.5
Exploit probability—
Product
Libssh
PublishedMar 26, 2026
First seenMar 26, 2026
Weakness typeCWE-1333CWE-1333
How to fix
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| libssh libssh | v ≤ 0.11.3 | — |
| redhat enterprise_linux | 9.0, 10.0 | — |
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