{"id":"CVE-2026-0967","title":"A flaw was found in libssh","summary":"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 expressio…","severity":"medium","cvss":5.5,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","cwe":["CWE-1333"],"vendor":"libssh","product":"libssh","affected":["libssh <= 0.11.3","enterprise_linux = 9.0","enterprise_linux = 10.0"],"published":"2026-03-26","updated":"2026-08-21","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-0967","references":[{"url":"https://access.redhat.com/errata/RHSA-2026:18160","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2026:18683","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/security/cve/CVE-2026-0967","label":"secalert@redhat.com"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2436981","label":"secalert@redhat.com"},{"url":"https://www.libssh.org/2026/02/10/libssh-0-12-0-and-0-11-4-security-releases/","label":"secalert@redhat.com"}],"tags":["nvd"],"epss":0.00223,"epssPercentile":0.13134,"ingestedAt":"2026-08-21T14:17:57.672Z","slug":"CVE-2026-0967","body":"## Overview\n\nA 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.\n\n## Affected\n\n- `libssh <= 0.11.3`\n- `enterprise_linux = 9.0`\n- `enterprise_linux = 10.0`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}