CVE-2026-3862 Cross-Site Scripting Vulnerability in SiteMinder Administrative UI
Attackers can inject malicious scripts into the SiteMinder Administrative UI, potentially leading to session hijacking or unauthorized actions.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-3862?
CVE-2026-3862 is a medium-severity cross-site scripting vulnerability in Broadcom SiteMinder, published on 10 Mar 2026. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.
Official description
Cross-site Scripting (XSS) allows an attacker to submit specially crafted data to the application which is returned unaltered in the resulting web page.
Weakness: CWE-79
Which versions are affected by CVE-2026-3862?
It affects 1 product.
Products include Broadcom Symantec Siteminder.
How do I fix CVE-2026-3862?
No fix has been published for CVE-2026-3862 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-3862 being exploited?
There is no known exploitation of CVE-2026-3862 in the wild and no public exploit code.
Other vulnerabilities in Broadcom SiteMinder
Sources
Also known as GHSA-5p5r-v3f4-wcfv.