CVE-2026-59655

Apache CloudStack: Unauthenticated OAuth provider client-secret disclosure

Published Aug 21, 2026 CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
CPEs cpe:2.3:a:apache:cloudstack:*:*:*:*:*:*:*:*
Type Values Removed Values Added
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Apache
Apache cloudstack
Vendors & Products Apache
Apache cloudstack
Type Values Removed Values Added
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.
Title Apache CloudStack: Unauthenticated OAuth provider client-secret disclosure
Weaknesses CWE-200
References
Weaknesses

Sources

Status
PUBLISHED
Assigner
apache
Published
Updated
Aug 25, 2026, 7:24 PM
Reserved
Jul 6, 2026, 9:08 AM
Status
Analyzed
Published
Aug 21, 2026, 9:16 AM
Modified
Oct 16, 2026, 3:10 PM