Vulnerability in iXsystems TrueNAS SCALE
CVSS score
8.3
EPSS probability
—
Risk score
0.8
Published
2 h ago
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Vulnerability description
DayBreach AI Explanation
Verified against sourcesSources read
2
Source agreement
Tam uyum
Evidence confidence
%63
Short explanation
In TrueNAS SCALE versions prior to 25.10.8, a flaw in the HA heartbeat origin check of the middlewared component allows an attacker on the same network segment to obtain unauthenticated full‑administrator API access and execute commands with root privileges, severely threatening system integrity and confidentiality.
An attacker can gain full control without authentication, enabling data theft, service disruption, and persistent access within the network.
What should be done?
- Follow the vendor advisory and upgrade to version ≥25.10.8
- Restrict network access to the HA heartbeat interface
- Block traffic from untrusted hosts to the heartbeat port via firewall
- Monitor and log unauthorized API calls
- Apply patches promptly when released
Chain of evidence and sources
middlewared bileşenindeki HA peer‑authentication kancası (ha_permission) koşulsuz olarak kaydedilir; bir saldırgan, 169.254.10.1 veya 169.254.10.2 adresine ve 1024’den düşük bir porta sahip TCP bağlantısı kurduğunda tüm API metodları için tam yönetici kimlik bilgisi alır.
Bu kimlik doğrulama atlatması, saldırganın root yetkileriyle komut çalıştırmasına ve sistemde tam kontrol elde etmesine yol açar.
Etkilenen sürümler 25.10.8’den önceki TrueNAS SCALE sürümleridir; yama durumu resmi kaynaklarda doğrulanamamıştır.
Show the technical text from the sources
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).
CVSS vector: CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
CWE: CWE-290
This explanation was compiled automatically from the source records. Scores, active exploitation, patch and exploit status come straight from the sources.
IMPACT: Affected Products and Software
Affected Products
The following products are affected by CVE-2026-123033 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.
| ID | VENDOR | PRODUCT | ACTION |
|---|---|---|---|
| 1 | iXsystems | TrueNAS SCALE | View |
RED HAT CSAF/VEX: Product Impact Check
SCORING: CVSS from Multiple Sources
CVSS Scores
The Common Vulnerability Scoring System is a standardised framework for assessing the severity of vulnerabilities in software and systems. We collect and display CVSS scores from several sources for each CVE.
| SCORE | VERSION | SEVERITY | VECTOR | SOURCE |
|---|---|---|---|---|
| 8.3 | CVSS V3_1 | HIGH | CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H | CVE CNA |
| 8.3 | CVSS V31 | HIGH | CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H | NVD |
Patch and Remediation Guide
Solution & Remediation Advisory
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Public exploit and active exploitation status
Verified exploit intelligence
No verified public PoC, exploit repository or Metasploit module has been found for this CVE yet.
Weakness Classification and Attack Patterns (CWE & CAPEC)
CWE - Common Weakness Enumeration
While CVE identifies specific instances of vulnerabilities, CWE categorises the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-123033 is associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-123033 weaknesses.
Attack Vector and Accessibility
Official Sources and Advisories
CVSS Vector Radar Chart
8.3 / 10Vulnerability Scoring Details
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:HYama durumu bilinmiyor
Weakness Type (CWE & CAPEC)
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