CVE-2026-61398
Received Received - Intake

Improper Output Encoding in Apache CloudStack UI

Publication date: 2026-08-21

Last updated on: 2026-08-21

Assigner: Apache Software Foundation

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.

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Meta Information

Published
2026-08-21
Last Modified
2026-08-21
Generated
2026-08-21
AI Q&A
2026-08-21
EPSS Evaluated
N/A
NVD
CVE-2026-61398
EUVD
EUVD-2026-63839

Affected Vendors & Products

Showing 4 associated CPEs
Vendor Product Version / Range
apache cloudstack From 4.15.1.0 (inc) to 4.20.3.0 (inc)
apache cloudstack From 4.21.0.0 (inc) to 4.22.1.0 (inc)
apache cloudstack 4.20.3.1
apache cloudstack 4.22.1.1

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-116 The product prepares a structured message for communication with another component, but encoding or escaping of the data is either missing or done incorrectly. As a result, the intended structure of the message is not preserved.

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Executive Summary

This is an Improper Encoding or Escaping of Output vulnerability in Apache CloudStack's UI. It occurs specifically in the Instance Reset Password functionality, which could allow attackers to inject malicious scripts or commands.

Detection Guidance

This vulnerability involves improper encoding in Apache CloudStack's UI during Instance Reset Password functionality. To detect it, check if your CloudStack version is between 4.15.1.0-4.20.3.0 or 4.21.0.0-4.22.1.0. No specific commands are provided in the context.

Impact Analysis

An attacker could exploit this to execute arbitrary code or steal sensitive data through the UI. Users of affected CloudStack versions may face unauthorized access or data breaches if the issue is not patched.

Compliance Impact

This vulnerability could lead to unauthorized data access or exposure, potentially violating GDPR (data protection) and HIPAA (health data privacy) requirements. Organizations must patch to maintain compliance.

Mitigation Strategies

Upgrade Apache CloudStack to version 4.20.3.1 or 4.22.1.1 or later to fix the vulnerability.

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