CVE-2026-66092 Stored XSS in pre-login notice via reachable legacy logon route
- Exploited in the wild
- Not known
- Fix
- None listed
What is CVE-2026-66092?
CVE-2026-66092 is a medium-severity vulnerability in Apereo Foundation openEQUELLA, published on 29 Oct 2026.
Official description
In openEQUELLA before 2026.2, the pre-login notice is stored as HTML and rendered on the legacy logon page without encoding or sanitisation. A user holding the EDIT_SYSTEM_SETTINGS permission can set a notice containing an arbitrary script (PUT /api/preloginnotice), resulting in stored cross-site scripting on the login page. Unauthenticated exploitation is possible where EDIT_SYSTEM_SETTINGS has been granted to the guest user or Everyone
Weakness: CWE-79
Which versions are affected by CVE-2026-66092?
How do I fix CVE-2026-66092?
No fix has been published for CVE-2026-66092 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-66092 being exploited?
There is no known exploitation of CVE-2026-66092 in the wild and no public exploit code.
Sources
Also known as GHSA-xhf6-8p48-3pxq.