CVE-2026-39842: OpenRemote is an open-source IoT platform

Q: How do I fix CVE-2026-39842?

openremote: upgrade to 1.22.0. Exact commands for each OS are on this page.

Q: Is CVE-2026-39842 being exploited?

CVE-2026-39842 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-39842 affect?

CVE-2026-39842 affects openremote. Severity is critical (CVSS 9.9). OpenRemote is an open-source IoT platform. Versions 1.21.0 and below contain two interrelated expression injection vulnerabilities in the rules engine that allow arbitrary code execution on the server. The JavaScript rules engine executes u

Q: How urgent is CVE-2026-39842?

Priority 55/100. Critical severity; Public exploit reference

This month

CRITICAL 9.9UPGRADE

CVE-2026-39842 is a critical-severity flaw (CVSS 9.9) affecting openremote. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

OpenRemote is an open-source IoT platform. Versions 1.21.0 and below contain two interrelated expression injection vulnerabilities in the rules engine that allow arbitrary code execution on the server. The JavaScript rules engine executes user-supplied scripts via Nashorn's ScriptEngine.eval() without sandboxing, class filtering, or access restrictions, and the authorization check in RulesResourceImpl only restricts Groovy rules to superusers whi

Why this priority

Critical severity
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	9.9 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.9% (top 40%)
CISA exploited list	No
Weakness	CWE-94, CWE-917
Published	2026-04-15
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: openremote

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-15 04:17 UTCPublished CVE record published
2026-06-17 10:42 UTCUpdated Record last modified

openremote openremote UPGRADE

Affected: < 1.22.0

Fixed in: 1.22.0

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy openremote || rpm -q openremote || openremote --version

2. UPGRADE to 1.22.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade openremote

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade openremote

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Exact fixes by distribution

Maven · io.openremote:openremote-manager · FIXED · 1.22.0 · vulnerable: <= 1.21.0 · source

Set io.openremote:openremote-manager to 1.22.0 or later in pom.xml or build.gradle, then rebuild and redeploy.

Fedora 46 · icecat · FIXED · 153.6.0-2.rh1.fc46 · FEDORA-2026-25e05b5320 · source

sudo dnf upgrade --advisory=FEDORA-2026-25e05b5320

Fedora ELN · edk2 · FIXED · 20260812-14.eln159 · FEDORA-2026-8850ef9153 · source

sudo dnf upgrade --advisory=FEDORA-2026-8850ef9153

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

GitHub PoC: keraattin/CVE-2026-39842 (1 stars)
Write-up: github.com/openremote/openremote/security/advisories/GHSA-7mqr-33rv-p3mp

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-39842?

openremote: upgrade to 1.22.0. Exact commands for each OS are on this page.

Is CVE-2026-39842 being exploited?

CVE-2026-39842 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-39842 affect?

CVE-2026-39842 affects openremote. Severity is critical (CVSS 9.9). OpenRemote is an open-source IoT platform. Versions 1.21.0 and below contain two interrelated expression injection vulnerabilities in the rules engine that allow arbitrary code execution on the server. The JavaScript rules engine executes u

How urgent is CVE-2026-39842?

Priority 55/100. Critical severity; Public exploit reference

Related CVEs

CVE-2026-62238 HIGH 8.8 UPGRADE OpenRemote before 1.26.0 contain an authenticated SQL injection vulnerability in the datapoint crosstab export
CVE-2026-41166 HIGH 7.0 UPGRADE OpenRemote is an open-source internet-of-things platform
CVE-2026-40882 HIGH 7.6 UPGRADE OpenRemote is an open-source internet-of-things platform

References

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