CVE-2026-84860 Scada-LTS DWR Authorization Bypass - Systemic
Authenticated users can bypass authorization controls to invoke restricted DWR methods, potentially leading to privilege escalation or code execution.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-84860?
CVE-2026-84860 is a high-severity missing authorization vulnerability in Scada-LTS, published on 16 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
ScadaLTS 2.8.1-release-candidate build 0 is affected by an Authorization Bypass
Spring Security gates DWR endpoints by URL path pattern, but DWR itself dispatches method calls based on the POST body parameters c0-scriptName and c0-methodName. The crossDomainSessionSecurity setting in web.xml is set to false, which disables DWR's built-in origin validation. This means any authenticated user can invoke any DWR method (regardless of the URL-based access control) by sending their request to a URL they are permitted to access (e.g. MiscDwr.initializeLongPoll.dwr) while targeting a restricted class in the POST body.
This is the systemic root cause that enables multiple other findings to be exploited as a low privilege user.
Weakness: CWE-639
Which versions are affected by CVE-2026-84860?
How do I fix CVE-2026-84860?
No fix has been published for CVE-2026-84860 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-84860 being exploited?
There is no known exploitation of CVE-2026-84860 in the wild and no public exploit code.
Sources
Also known as GHSA-4vrr-rhf8-cpc9.