CVE-2026-59655

Analyzed Analyzed - Analysis Complete

Exposure of Sensitive Information in Apache CloudStack OAuth Plugin

Publication date: 2026-08-21

Last updated on: 2026-08-27

Assigner: Apache Software Foundation

Description

Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Apache CloudStack's OAuth authentication plugin while listing OAuth providers. This issue affects Apache CloudStack: from 4.19.0.0 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.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-08-21

Last Modified

2026-08-27

Generated

2026-09-10

AI Q&A

2026-08-21

EPSS Evaluated

2026-09-09

NVD

CVE-2026-59655

EUVD

EUVD-2026-63844

Affected Vendors & Products

Vendor	Product	Version / Range
apache	cloudstack	From 4.21.0.0 (inc) to 4.22.1.1 (exc)
apache	cloudstack	From 4.19.0.0 (inc) to 4.20.3.1 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-200	The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.

Attack-Flow Graph

Executive Summary

This vulnerability involves the exposure of sensitive information to unauthorized actors due to a flaw in Apache CloudStack's OAuth authentication plugin. Specifically, it occurs when listing OAuth providers, potentially allowing attackers to access confidential data.

Detection Guidance

This vulnerability involves exposure of sensitive information in Apache CloudStack's OAuth authentication plugin. To detect it, check if your CloudStack version is between 4.19.0.0-4.20.3.0 or 4.21.0.0-4.22.1.0. Verify if OAuth providers are configured and review logs for unauthorized access attempts to OAuth provider listings.

Impact Analysis

If exploited, this vulnerability could lead to unauthorized access to sensitive information, compromising user data, authentication credentials, or other confidential details managed by Apache CloudStack.

Compliance Impact

This vulnerability may violate compliance requirements under GDPR, HIPAA, or other regulations by exposing sensitive personal or health data to unauthorized parties, potentially resulting in legal penalties or reputational damage.

Mitigation Strategies

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

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