{"id":"JLSEC-2026-781","details":"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 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.","modified":"2026-07-23T15:00:04.718809891Z","published":"2026-07-23T14:46:44.710Z","upstream":["CVE-2026-0966"],"database_specific":{"license":"CC-BY-4.0","sources":[{"published":"2026-03-26T21:17:00.783Z","url":"https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-0966","html_url":"https://nvd.nist.gov/vuln/detail/CVE-2026-0966","database_specific":{"status":"Modified"},"id":"CVE-2026-0966","imported":"2026-07-22T03:16:27.692Z","modified":"2026-06-17T10:11:42.263Z"}]},"references":[{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2026:18160"},{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2026:18683"},{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2026:7067"},{"type":"WEB","url":"https://access.redhat.com/security/cve/CVE-2026-0966"},{"type":"WEB","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2433121"},{"type":"WEB","url":"https://www.libssh.org/2026/02/10/libssh-0-12-0-and-0-11-4-security-releases/"}],"affected":[{"package":{"name":"libssh_jll","ecosystem":"Julia","purl":"pkg:julia/libssh_jll?uuid=a8d4f100-aa25-5708-be18-96e0805c2c9d"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"0.11.4+0"}]}],"database_specific":{"source":"https://github.com/JuliaLang/SecurityAdvisories.jl/tree/generated/osv/2026/JLSEC-2026-781.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H"}]}