CVE-2026-67310

openremote before 1.27.0 Cross-Tenant IDOR via setAssetLinks

Published Aug 1, 2026 CVSS 4.0 · 5.3 Medium EPSS < 1% KEV · Not listed

Description

OpenRemote (org.openremote:openremote) versions <= 1.26.2 contain an insecure direct object reference vulnerability in the setAssetLinks endpoint of AlarmResourceImpl. The realm access check validates only a single realm obtained via realms.stream().findFirst() on a HashSet of realms from the request, rather than all realms. Because HashSet iteration order is non-deterministic, an authenticated attacker who includes alarm-asset links from both their own realm and a victim realm can, with roughly 50% probability per request (retryable), persist cross-tenant links and disclose victim asset names (returned via @Formula fields) through GET requests on the attacker's own alarm. Fixed in 1.27.0.

Analysis

Technical impact

The vulnerability is an insecure direct object reference located in the setAssetLinks endpoint of AlarmResourceImpl. It allows an authenticated user to add alarm‑asset links that belong to a different tenant’s realm. When the endpoint returns link data, the attacker can view asset names that belong to the victim realm through GET requests on the attacker’s own alarm. This constitutes a confidentiality breach of cross‑tenant data.

Affected Systems

OpenRemote software, vendor OpenRemote, product OpenRemote, versions up to and including 1.26.2. The issue was addressed in release 1.27.0 and later.

Risk and Exploitability

The CVSS score of 5.3 indicates moderate severity. EPSS is not available, and the vulnerability is not listed in CISA KEV. Exploitation requires an authenticated attacker, but because HashSet iteration is nondeterministic, each request has roughly a 50% chance to succeed, making it retryable. While the likelihood of widespread exploitation remains low, an attacker who can repeatedly attempt the operation can eventually achieve data disclosure.

Affected Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

openremote

unaffected

Version	Status	Constraints
`0`	affected	< 1.27.0
`1.27.0`	unaffected	—

No data.

Vendor Product Versions

Openremote

Version	Status	Scheme	Platform
`[0,1.27.0)`	affected	semver	—
`[1.27.0,*]`	unaffected	semver	—

Remediation

No solution or workaround provided in the CVE record.

OpenCVE Recommended Actions

Upgrade OpenRemote to version 1.27.0 or later, which removes the insecure realm check in setAssetLinks.
Revalidate tenant configurations to ensure that asset links are restricted to the creator’s realm and remove any legacy cross‑realm links that may remain after upgrade.
Run a functional test against the setAssetLinks endpoint with a non‑privileged user to confirm that the realm validation now rejects links from other realms.

Generated by OpenCVE AI on August 2, 2026 at 03:08 UTC.

Tracking

Advisories

No advisories available

Metrics

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact Low

Vulnerable System Integrity Impact Low

Vulnerable System Availability Impact None

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact Low

Integrity Impact Low

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploit prediction score: < 1% (0.239% probability within 30 days)

Exploitation none

Automatable no

Technical Impact partial

References

Link	Providers
https://github.com/openremote/openremote/security/advisories/GHSA-q2gm-frx3-2qjr
https://www.vulncheck.com/advisories/openremote-before-cross-tenant-idor-via-setassetlinks

History

Aug 3, 2026 4:30 PM Scoring metrics updated View changes

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Aug 1, 2026 12:45 PM Description updated. Title updated. First appearance in the feed. Weaknesses updated. Affected versions updated. Affected vendors updated. Added references. Scoring metrics updated View changes

Type	Values Removed	Values Added
Description		OpenRemote (org.openremote:openremote) versions <= 1.26.2 contain an insecure direct object reference vulnerability in the setAssetLinks endpoint of AlarmResourceImpl. The realm access check validates only a single realm obtained via realms.stream().findFirst() on a HashSet of realms from the request, rather than all realms. Because HashSet iteration order is non-deterministic, an authenticated attacker who includes alarm-asset links from both their own realm and a victim realm can, with roughly 50% probability per request (retryable), persist cross-tenant links and disclose victim asset names (returned via @Formula fields) through GET requests on the attacker's own alarm. Fixed in 1.27.0.
Title		openremote before 1.27.0 Cross-Tenant IDOR via setAssetLinks
First Time appeared		Openremote Openremote openremote
Weaknesses		CWE-863
CPEs		cpe:2.3:a:openremote:openremote::::::::
Vendors & Products		Openremote Openremote openremote
References		https://github.com/openremote/openremote/security/advisories/GHSA-q2gm-frx3-2qjr https://www.vulncheck.com/advisories/openremote-before-cross-tenant-idor-via-setassetlinks
Metrics		cvssV3_1 `{'score': 5.4, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N'}` cvssV4_0 `{'score': 5.3, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N'}`