{"id":"CVE-2026-0966","title":"A flaw was found in libssh","summary":"A flaw was found in libssh. The API function `ssh_get_hexa()` is vulnerable to a denial of service when processing zero-length input. This can be exploited remotely by an attacker during GSSAPI (Generic Security Service Application Progr…","severity":"high","cvss":8.2,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H","cwe":["CWE-124"],"vendor":"libssh","product":"libssh","affected":["libssh < 0.11.4","hardened_images","openshift_container_platform = 4.0","enterprise_linux = 8.0","enterprise_linux = 9.0","enterprise_linux = 10.0"],"patched":["libssh 0.11.4"],"published":"2026-03-26","updated":"2026-08-21","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-0966","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/errata/RHSA-2026:7067","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/security/cve/CVE-2026-0966","label":"secalert@redhat.com"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2433121","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":0.00582,"epssPercentile":0.46523,"ingestedAt":"2026-08-21T13:17:18.791Z","slug":"CVE-2026-0966","body":"## Overview\n\nA flaw was found in libssh. The API function `ssh_get_hexa()` is vulnerable to a denial of service when processing zero-length input. This can be exploited remotely by an attacker during GSSAPI (Generic Security Service Application Program Interface) authentication if the server's logging verbosity is set to `SSH_LOG_PACKET (3)` or higher. Successful exploitation could lead to a self-Denial of Service of the per-connection daemon process.\n\n## Affected\n\n- `libssh < 0.11.4`\n- `hardened_images`\n- `openshift_container_platform = 4.0`\n- `enterprise_linux = 8.0`\n- `enterprise_linux = 9.0`\n- `enterprise_linux = 10.0`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `libssh 0.11.4`","depth":"twilight","depthScore":45,"depthScoreParts":{"impact":45.1,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}