CVE-2026-61398CWE-116

CVE-2026-61398

Critical · published August 21, 2026

CVSS v3.1
9.1
EPSS
1%
Percentile
46.3
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
9.1 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
CVSS v4.0
Not supplied
EPSS
0.00568 · 46.3th percentile
Weakness
CWE-116 · Improper Encoding or Escaping of Output
Published
2026-08-21T13:16Z
Affected products (2)
ProductVersionsFixed in
apache/cloudstack≥ 4.15.1.0, < 4.20.3.14.20.3.1
apache/cloudstack≥ 4.21.0.0, < 4.22.1.14.22.1.1
References (1)
https://lists.apache.org/thread/g6cwddtjrwbh1d56wjz4cfp3fzfm4kbc · [email protected]
EPSS history
Timeline
  • 21 AUG 08:25Z
    Apache CloudStack: Cross-Site Scripting (XSS) Vulnerability in Instance Reset Password Function in UI
    cvelistv5