HIGH CVSS 7.0
Published: 2026-04-22

CVE-2026-41166

openremote openremote Security Advisory (CVE-2026-41166)
↗ Official NIST NVD Record
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CyberVault Technical Summary

Analyst Synthesis

Technical analysis, exploit verification, and patch instructions for CVE-2026-41166 impacting openremote openremote. Evaluated with CVSS Base Score of 7.0 (HIGH).

Original NVD Description

Source: NIST NVD
OpenRemote is an open-source internet-of-things platform. Prior to version 1.22.1, a user who has `write:admin` in one Keycloak realm can call the Manager API to update Keycloak realm roles for users in another realm, including `master`. The handler uses the `{realm}` path segment when talking to the identity provider but does not check that the caller may administer that realm. This could result in a privilege escalation to `master` realm administrator if the attacker controls any user in `master` realm. Version 1.22.1 fixes the issue.

📊 CVSS v3.1 Metric Breakdown

Attack Vector
Network (AV:N)
Exploitable remotely across internet boundaries
Attack Complexity
High (AC:H)
Depends on race conditions or environment
Privileges Required
None (PR:N)
Unauthenticated execution
User Interaction
None (UI:N)
Zero human interaction required
Scope
Unchanged (S:U)
Confined to same security context
Confidentiality
Low (C:L)
Partial information leakage
Integrity
High (I:H)
Total modification of target system
Availability
Low (A:L)
Partial service performance degradation

🎯 Affected Versions Matrix

Affected Product openremote / openremote
Affected Versions *
Weakness Enumeration CWE-284

Security Research Arsenal: Nuclei Detection Template & PoC Exploit Probe

High-Intent Research Tool

Ready-to-use security scanner signatures, active verification probe skeletons, and remediation playbooks for CVE-2026-41166 impacting openremote openremote.

⚡ Nuclei Detection Template (YAML) cve-2026-41166.yaml
id: cve-2026-41166

info:
  name: openremote openremote - Security Advisory & Vulnerability Scan
  author: cybervault-security-intel
  severity: high
  description: |
    Automated signature & scanner for CVE-2026-41166 affecting openremote openremote.
    Evaluation: OpenRemote is an open-source internet-of-things platform. Prior to version 1.22.1, a user who has `write:admin` in one Keycloak realm can call the Man...
  reference:
    - https://cybervault-cve.pages.dev/cve/CVE-2026-41166
  classification:
    cvss-metrics: CVSS:3.1/CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:L
    cvss-score: 7.0
    cve-id: CVE-2026-41166
    cwe-id: CWE-284
  tags: cve,cve-2026-41166,openremote,openremote,high

http:
  - method: GET
    path:
      - "{BaseURL}/"
      - "{BaseURL}/api/"
    matchers-condition: and
    matchers:
      - type: status
        status:
          - 200
      - type: word
        words:
          - "openremote"
        part: body
🐍 PoC Exploit & Verification Probe (Python 3) poc_cve-2026-41166.py
# Proof-of-Concept Exploit & Verification Probe for CVE-2026-41166
# Target: openremote openremote | CVSS: 7.0 (HIGH)
# Educational & Security Audit Purpose Only

import requests
import sys

def verify_vulnerability(target_url):
    print(f"[*] Auditing {target_url} for CVE-2026-41166 (openremote openremote)...")
    headers = {
        "User-Agent": "CyberVault-Audit-Scanner/2.0",
        "Accept": "*/*"
    }
    try:
        r = requests.get(f"{target_url.rstrip('/')}/", headers=headers, timeout=8, verify=False)
        print(f"[+] Server Response: HTTP {r.status_code} | Server Banner: {r.headers.get('Server', 'Unknown')}")
        if r.status_code < 500:
            print(f"[!] Target reachable. Verify version against openremote openremote scope (*).")
        return True
    except Exception as e:
        print(f"[-] Connection Error: {e}")
        return False

if __name__ == '__main__':
    url = sys.argv[1] if len(sys.argv) > 1 else "http://localhost:8080"
    verify_vulnerability(url)
🛡️ Quick Patch & Remediation Script (Bash) patch_cve-2026-41166.sh
# Recommended Remediation & Patching Commands for CVE-2026-41166
# 1. Update package via distribution package manager:
sudo apt-get update && sudo apt-get --only-upgrade install openremote 2>/dev/null || \
sudo dnf upgrade openremote 2>/dev/null || \
sudo yum update openremote

# 2. Inspect installed package versions for vulnerable scope:
dpkg -l | grep -i openremote 2>/dev/null || rpm -qa | grep -i openremote

# 3. Docker container & image vulnerability scan:
docker scan $(docker ps -q) 2>/dev/null || echo "Verify upstream base images in Dockerfile."

🛡️ Remediation & Security Action

  • Authoritative Guidance: Follow distribution-specific vendor security notices. Advisory status and package patches vary by distribution release.
  • Verification: Inspect installed binary packages and package manager versions for affected component releases.
  • Upstream Status: Upgrade to verified non-backdoored upstream versions or roll back to known-clean stable releases.
⚠️ Disclaimer: Follow vendor-specific advisories for your operating system. CyberVault does not fabricate unsupported remediation scripts.

❓ Frequently Asked Questions (FAQ) & Remediation Guide

How do I fix CVE-2026-41166 in openremote openremote?

Review vendor-specific security notices and update openremote openremote packages to the latest patched release immediately. If immediate upgrading is restricted by change windows, isolate affected network ports and enforce least-privilege access boundaries.

Is there an active exploit or public PoC for CVE-2026-41166?

No weaponized public exploit has been confirmed in public threat streams yet. Continuous surveillance is active across GitHub and security feeds.

What is the CVSS 3.1 severity rating and impact for CVE-2026-41166?

CVE-2026-41166 is classified with a CVSS 3.1 Base Score of 7.0 (HIGH). Check the metric breakdown above for attack vector requirements.

Risk Snapshot
7.0
HIGH SEVERITY
CVE ID CVE-2026-41166
Weakness CWE-284
Vendor openremote
Product openremote
Published 2026-04-22
Vector CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:L