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CVE-2026-66013 – Authentication Bypass – OpenRemote before 1.26.2

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Summary

CVE-2026-66013 is a critical authentication bypass vulnerability (CVSS 4.0: 9.3) in OpenRemote, an open-source enterprise IoT platform. The flaw resides in the public console registration API, which performs no authentication, ownership validation, or realm verification when updating an existing console record — allowing unauthenticated remote attackers to overwrite any console asset by supplying a known asset identifier. All OpenRemote releases prior to version 1.26.2 are affected.

Technical details

  • Root cause: The console registration endpoint treats console asset IDs as authorization credentials rather than object references (CWE-639: Authorization Bypass Through User-Controlled Key; CWE-862: Missing Authorization). The API lacks authentication requirements, ownership checks, realm matching, and re-registration secrets, so possession of a console asset ID alone is sufficient to authorize arbitrary mutations to that asset.
  • Trigger condition: An attacker must obtain a valid console asset ID, which may be exposed via client-side storage, application logs, network traffic, or URLs — common in IoT deployment scenarios.
  • Attack vector: Fully network-accessible (AV:N) with no credentials required (PR:N), no user interaction (UI:N), low attack complexity (AC:L), and no attack prerequisites (AT:N).
  • Impact: An attacker can overwrite push notification tokens and console provider metadata for any known console asset, redirecting or suppressing operational alerts sent to legitimate consoles. Multi-tenant deployments are particularly at risk due to global asset lookup without realm scoping, enabling cross-tenant console takeover.

Affected software

  • OpenRemote all versions ≤ 1.26.1

Severity

  • CVSS 4.0 Base Score: 9.3 (Critical)
  • Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N

Mitigation and recommended actions

  • Immediate: Upgrade to OpenRemote version 1.26.2, which was confirmed by the vendor to address unauthenticated console registration by introducing proper authentication requirements, ownership verification, and realm validation for console re-registration scenarios.
  • If immediate patching is not feasible, restrict network-level access to OpenRemote Manager API endpoints from untrusted or external networks, and monitor for anomalous or unexpected console registration requests.

IONIX Status

The IONIX research team is tracking ongoing exploitation attempts and recommends immediate patching. Potentially affected assets are outlined in this post.

References

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