EUVD-2026-63844
GHSA-73gx-q9q8-7w92
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Unauthenticated network request triggers disclosure of OAuth secrets (C:H); no integrity or availability impact from passive information exposure.
Primary rating from Vendor (apache).
CVSS VectorVendor: apache
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Lifecycle Timeline
4DescriptionCVE.org
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.
AnalysisAI
Sensitive OAuth configuration data is exposed to unauthenticated remote actors in Apache CloudStack's OAuth authentication plugin when the OAuth provider listing endpoint is queried. Affected versions span two release branches: 4.19.0.0-4.20.3.0 and 4.21.0.0-4.22.1.0. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires that the Apache CloudStack OAuth authentication plugin is enabled and at least one external OAuth provider (e.g., Google, GitHub, or a corporate IdP) has been configured. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N paints a severe picture: trivially exploitable over the network with no authentication, yielding high confidentiality impact. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Upgrade to Apache CloudStack version 4.20.3.1 (for environments on the 4.20.x branch) or 4.22.1.1 (for environments on the 4.22.x branch), both of which resolve this issue per the Apache advisory at https://lists.apache.org/thread/g6cwddtjrwbh1d56wjz4cfp3fzfm4kbc. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, identify all Apache CloudStack instances running versions 4.19.0.0-4.20.3.0 or 4.21.0.0-4.22.1.0 and verify which have OAuth authentication enabled. …
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External POC / Exploit Code
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