CVE-2026-0966
highA flaw was found in libssh.
Vendor / product: Libssh — libssh
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.
CVSS
8.2
8.2 (CVSS v3.1)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H Severity source: NVD CVSS v3.1 (nvd@nist.gov)
Timeline (UTC)
Published: 2026-03-26 21:17
Modified: 2026-11-05 17:17
NVD status: Modified
Last synced 9 hours ago
Verified against the source API 2026-11-05 17:18 UTC
Exploitation
Not listed in CISA KEV (as of last catalog sync)
Absence from KEV does not mean a CVE is not exploited. Exploitation status: unknown (no authoritative evidence in our sources).
Affected products
libssh / libssh <0.11.4
redhat / hardened_images all versions
redhat / openshift_container_platform 4.0
redhat / enterprise_linux 8.0, 9.0, 10.0
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
Vendor advisory: https://access.redhat.com/errata/RHSA-2026:7067
Vendor advisory: https://access.redhat.com/security/cve/CVE-2026-0966
Vendor advisory: https://bugzilla.redhat.com/show_bug.cgi?id=2433121
Patch / mitigation: https://access.redhat.com/security/cve/CVE-2026-0966
References
- https://access.redhat.com/errata/RHSA-2026:18160 secalert@redhat.com
- https://access.redhat.com/errata/RHSA-2026:18683 secalert@redhat.com
- https://access.redhat.com/errata/RHSA-2026:7067 secalert@redhat.com
- https://access.redhat.com/security/cve/CVE-2026-0966 secalert@redhat.com
- https://bugzilla.redhat.com/show_bug.cgi?id=2433121 secalert@redhat.com
- https://www.libssh.org/2026/02/10/libssh-0-12-0-and-0-11-4-security-releases/ secalert@redhat.com
Data sources
NVD CVE API 2.0 — fetched 2026-11-05 17:18 UTC · record ↗