CVE-2026-123033

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{"bugzilla": {"description": "middlewared: middlewared: Authentication bypass via improper HA heartbeat origin check", "id": "2567590", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2567590"}, "csaw": false, "cvss3": {"cvss3_base_score": "8.3", "cvss3_scoring_vector": "CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-940", "details": ["Authentication bypass in the HA heartbeat origin check in middlewared in TrueNAS SCALE before 25.10.8 (and in release trains before their respective fixes) allows an attacker on the same network segment to achieve unauthenticated full-administrator API access and execute commands as root. middlewared registers the HA peer-authentication hook (ha_permission) unconditionally, with no failover-licence or heartbeat-interface check. An unauthenticated connection whose TCP peer address is a hardcoded HA heartbeat address (169.254.10.1 or 169.254.10.2) and whose peer port is <= 1024 is granted a node credential that is authorized for every API method and treated as full administrator. Both conditions are properties of the attacker's own socket, and thus an attacker on the same layer-2 segment satisfies them without forging anything. The hook is present on non-HA, unlicensed, single-node Community Edition installations. The fix additionally requires that the connection terminate on the HA heartbeat listener (a local address/port the attacker cannot control).", "A flaw was found in middlewared. An unauthenticated attacker on the same local network segment can bypass authentication by establishing a connection matching high-availability (HA) heartbeat attributes. This improper origin check grants administrative API access, enabling the attacker to execute arbitrary commands with root privileges."], "mitigation": {"lang": "en:us", "value": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability."}, "name": "CVE-2026-123033", "public_date": "2026-11-05T06:58:31Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-123033\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-123033\nhttps://security.truenas.com/scale/impact-statements/ha-node-auth-bypass/"], "statement": "This vulnerability has been rated as Important because an attacker with adjacent network access can bypass authentication checks to gain full administrative privileges and execute arbitrary commands. However, the middlewared service is specific to TrueNAS SCALE software and is not packaged or distributed in Red Hat Enterprise Linux or any other Red Hat product offerings. As a result, Red Hat products are not affected by this vulnerability.", "threat_severity": "Important"}

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