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CVE-2026-123033

Quick assessment

Affected
iXsystems TrueNAS SCALE
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 TrueNAS SCALE 25.10.8 版本之前（以及各发布系列在对应修复之前），middlewared 组件中用于高可用（HA）心跳源地址检查的身份验证绕过漏洞，允许处于同一网段的攻击者在未通过身份验证的情况下，获得完全管理员权限的 API 访问权，并以 root 用户身份执行命令。 该漏洞的成因在于：middlewared 无条件注册了 HA 对等体身份验证钩子（ha_permission），且未进行故障转移许可证或心跳接口的检查。对于未认证的连接，若其 TCP 对等地址为硬编码的 HA 心跳地址（16

CVSS 8.3 · High
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I. Basic Information for CVE-2026-123033

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
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).
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
使用欺骗进行的认证绕过
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
iXsystems TrueNAS SCALE 0 ~ 25.10.8 -

II. Public POCs for CVE-2026-123033

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III. Intelligence Information for CVE-2026-123033

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Other References for CVE-2026-123033 (1)

IV. Related Vulnerabilities

Same vendor: iXsystems
Same weakness: CWE-290