# CVE-2026-116184: OpenRemote before 1.31.0 Cross-Realm Gateway Impersonation via Websocket

Status: published. Published: 2026-10-25. Updated: 2026-11-04.

OpenRemote before 1.31.0 contains an authorization bypass vulnerability that allows realm admins to impersonate gateways in other realms because GatewayService only checks the gateway ID, not the realm. Attackers with WRITE:ADMIN in one realm can create a service user named after another realm's gateway ID to overwrite its descendant assets and open SSH tunnels into its local network.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- openremote / core (io.openremote/openremote-manager): ≥ 0; < 1.31.0 (affected, semver); 1.31.0 (unaffected, semver). Source: CNA: VulnCheck

## Severity and prioritization

- CVSS 4.0: 2.1 (low); CVSS:4.0/AV:N/AC:H/AT:N/PR:H/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N; source: CNA: VulnCheck

- CISA KEV: No listing in collected sources

- EPSS: 0.24% as of 2026-11-04; percentile 15.27%

- SSVC: exploitation none; automatable no; technical impact partial; source ADP: CISA-ADP

- Weaknesses: CWE-639

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://github.com/openremote/core/security/advisories/GHSA-2j4x-qh6q-q8mm (CNA: VulnCheck; vendor-advisory)

- https://www.vulncheck.com/advisories/openremote-before-1.31.0-cross-realm-gateway-impersonation-via-websocket (CNA: VulnCheck; third-party-advisory)

## Provenance

- CNA: VulnCheck: https://www.cve.org/CVERecord?id=CVE-2026-116184; retrieved 2026-11-04; source updated 2026-11-04

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-116184; retrieved 2026-11-04; source updated Not reported

Revision: ea6c8b9bf4dafd2c8567f29502949e79275f93cc7e7d299feeb10b86b7075ad2

Canonical: https://y2.dev/cve/CVE-2026-116184

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- OpenAPI: https://y2.dev/api/openapi.yaml. Agent access metadata: https://y2.dev/cve/agent.json.

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