CVE-2026-59655: Apache CloudStack OAuth authentication information disclosure

CVE-2026-59655 · Severity: high · CVSS 7.5 · Published 2026-08-21

Apache CloudStack's OAuth authentication plugin exposes sensitive OAuth provider credentials and configuration details to unauthorized users. When an attacker lists OAuth providers through the vulnerable plugin, they can retrieve configuration information that should remain confidential, potentially compromising authentication systems and allowing further attacks against cloud infrastructure.

Technologies: Apache Cloudstack. Vendors: Apache.

Quick answers

Is CVE-2026-59655 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-59655 being exploited in the wild.
How severe is CVE-2026-59655?
High severity, with a CVSS score of 7.5, published 21 August 2026.
Which products and versions are affected?
Apache Cloudstack 4.19.0.0–4.20.3.0 and 4.21.0.0–4.22.1.0.
Is there a fix for CVE-2026-59655?
A patch was published on 2026-08-21: Fixes available in versions 4.20.3.1 and 4.22.1.1 or later Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-59655 attacked?
It is attacked over the network, in a web application.
Am I affected by CVE-2026-59655?
Check whether you run Apache Cloudstack at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

An information disclosure vulnerability exists in Apache CloudStack's OAuth authentication plugin when listing OAuth providers. The vulnerability allows an unauthenticated or low-privileged attacker to enumerate and retrieve sensitive OAuth provider details including credentials and configuration through the provider listing functionality. The issue affects CloudStack versions 4.19.0.0–4.20.3.0 and 4.21.0.0–4.22.1.0. Patches are available in versions 4.20.3.1 and 4.22.1.1 or later.

Affected products

  • Apache CloudStack 4.19.0.0–4.20.3.0 and 4.21.0.0–4.22.1.0

Timeline

  • 2026-08-21: disclosed
  • 2026-08-21: patched: Fixes available in versions 4.20.3.1 and 4.22.1.1 or later

References

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