Identity and access security
CVE-2026-3862: Cross-Site Scripting Vulnerability in SiteMinder Administrative UI
Cross-site Scripting (XSS) allows an attacker to submit specially crafted data to the application which is returned unaltered in the resulting web page.
Published
ExploitedNot in CISA KEV
Ransomware useNot reportedPer CISA
SeverityMEDIUMCVSS 4.0 4.6
EPSS0.25%Chance of exploitation in 30 days
Public exploitNot tracked
FixNot yet
Automatic summary from the vendor's CVE record. We haven't written a full analysis of this vulnerability yet.
Affected and fixed versions
| Product / branch | Fixed in |
|---|---|
| SiteMinder 12.9 | See the advisory |
| SiteMinder 12.8 | See the advisory |
Always confirm against the vendor advisory, which lists every fixed hotfix.
What it is
Cross-site Scripting (XSS) allows an attacker to submit specially crafted data to the application which is returned unaltered in the resulting web page.
Sources
KEV status, EPSS score and vendor data refreshed automatically, last on 10 Oct 2026.