High severity · published Aug 27, 2026
CVE-2026-81679
OpenRemote before 1.28.0 Cross-Realm Information Disclosure via Notification API
7.7
CVSS
0.4%
EPSS
No
On KEV
Description
OpenRemote versions before 1.28.0 contain a cross-realm information disclosure vulnerability in the Notification REST API that allows per-realm tenant administrators to read all tenants' sent notifications including message bodies. Attackers with read:admin credentials in one realm can submit a zero-parameter GET request to the notification endpoint to retrieve sensitive notification metadata and message content from all realms.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 33% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
OP
openremote · openremote
before 1.28.0 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-81679
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-81679
vendor-advisory
https://github.com/openremote/openremote/security/advisories/GHSA-6ff4-4frc-r287
third-party-advisory
https://www.vulncheck.com/advisories/openremote-before-1.28.0-cross-realm-information-disclosure-via-notification-api
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