{"id":"CVE-2026-0967","summary":"Libssh: libssh: denial of service via inefficient regular expression processing","details":"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.","modified":"2026-05-28T04:11:16.333280450Z","published":"2026-03-26T20:06:30.707Z","related":["ALSA-2026:18160","ALSA-2026:18683","SUSE-SU-2026:0567-1","SUSE-SU-2026:0778-1","SUSE-SU-2026:0779-1","SUSE-SU-2026:1344-1","SUSE-SU-2026:1565-1","SUSE-SU-2026:20524-1","SUSE-SU-2026:20531-1","SUSE-SU-2026:21396-1","SUSE-SU-2026:21428-1","openSUSE-SU-2026:10203-1","openSUSE-SU-2026:20647-1"],"database_specific":{"cwe_ids":["CWE-1333"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/0xxx/CVE-2026-0967.json","cna_assigner":"redhat"},"references":[{"type":"WEB","url":"https://access.redhat.com/downloads/content/package-browser/"},{"type":"WEB","url":"https://www.libssh.org/2026/02/10/libssh-0-12-0-and-0-11-4-security-releases/"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:18160"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:18683"},{"type":"ADVISORY","url":"https://access.redhat.com/security/cve/CVE-2026-0967"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/0xxx/CVE-2026-0967.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-0967"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2436981"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://gitlab.com/libssh/libssh-mirror","events":[{"introduced":"0"},{"last_affected":"301d0e16dfa8a5cac1cff956b6880ca90eb82864"}],"database_specific":{"source":"CPE_RANGE","extracted_events":[{"introduced":"0"},{"last_affected":"0.11.3"}],"cpe":"cpe:2.3:a:libssh:libssh:*:*:*:*:*:*:*:*"}}],"versions":["libssh-0.11.3","libssh-0.11.2","libssh-0.11.1","libssh-0.11.0","libssh-0.8.0","release-0-3-0"],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-0967.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:L/AC:H/PR:L/UI:R/S:U/C:N/I:N/A:L"}]}