CVE-2026-106555

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{"bugzilla": {"description": "openssh: OpenSSH: Information disclosure via GSSAPI authentication state persistence", "id": "2547190", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2547190"}, "csaw": false, "cvss3": {"cvss3_base_score": "2.2", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:L/I:N/A:N", "status": "draft"}, "cwe": "CWE-488", "details": ["In sshd in OpenSSH before 10.6, GSSAPIAuthentication authentication state can incorrectly be persisted across authentication attempts.", "A flaw was found in OpenSSH's SSH daemon (sshd). When Generic Security Service Application Program Interface (GSSAPI) authentication is enabled, authentication state can improperly persist across separate authentication attempts. A local user could exploit this condition during sequential authentication sessions to access residual credentials from prior attempts, resulting in an information disclosure."], "mitigation": {"lang": "en:us", "value": "Disable GSSAPI authentication in the SSH daemon configuration if Kerberos-based authentication is not required."}, "name": "CVE-2026-106555", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "openssh", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Fix deferred", "package_name": "openssh", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Fix deferred", "package_name": "openssh", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "openssh", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "openssh", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:hummingbird:1", "fix_state": "Not affected", "package_name": "openshell", "product_name": "Red Hat Hardened Images"}, {"cpe": "cpe:/a:redhat:hummingbird:1", "fix_state": "Affected", "package_name": "openssh", "product_name": "Red Hat Hardened Images"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Fix deferred", "package_name": "openshift/ose-rhel-coreos-8", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Fix deferred", "package_name": "openshift/ose-rhel-coreos-9", "product_name": "Red Hat OpenShift Container Platform 4"}], "public_date": "2026-10-06T20:28:56Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-106555\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-106555\nhttps://www.openssh.org/releasenotes.html#10.6"], "statement": "This vulnerability is rated as Low impact because exploitation is constrained to systems where GSSAPI authentication is explicitly enabled and yields only limited residual credential data rather than unauthorized access or privilege escalation. The condition requires a specific sequence of an initial failed GSSAPI negotiation followed by a successful secondary authentication method within the same connection. In standard deployments where GSSAPI is disabled or not used in conjunction with fallback authentication methods, the vulnerability cannot be triggered.", "threat_severity": "Low"}

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