CVE-2026-61398 Apache CloudStack: Cross-Site Scripting (XSS) Vulnerability in Instance Reset Password Function in UI
Attackers can inject malicious scripts via the Instance Reset Password function in the Apache CloudStack UI, potentially compromising user sessions.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-61398?
CVE-2026-61398 is a critical cross-site scripting vulnerability in Apache Cloudstack, published on 21 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Improper Encoding or Escaping of Output vulnerability in Apache CloudStack's UI while using Instance Reset Password functionality.
This issue affects Apache CloudStack: from 4.15.1.0 through 4.20.3.0 and from 4.21.0.0 through 4.22.1.0.
Users are recommended to upgrade to version 4.20.3.1 or 4.22.1.1 or later, which fixes the issue.
Weakness: CWE-116
Which versions are affected by CVE-2026-61398?
It affects 1 product.
Products include Apache Cloudstack.
How do I fix CVE-2026-61398?
No fix has been published for CVE-2026-61398 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-2026-61398 being exploited?
There is no known exploitation of CVE-2026-61398 in the wild and no public exploit code.
Other vulnerabilities in Apache Cloudstack
- CVE-2012-4501 Missing authorization in n/a
- CVE-2024-38346 Apache CloudStack: Unauthenticated cluster service port leads to remote execution
- CVE-2024-39864 Apache CloudStack: Integration API service uses dynamic port when disabled
- CVE-2024-29006 Apache CloudStack: x-forwarded-for HTTP header parsed by default
- CVE-2022-35741 Apache CloudStack SAML Single Sign-On XXE
Sources
Also known as GHSA-9xgp-62vf-q3qv.