CVE-2026-61397: Apache CloudStack sensitive information exposure in OAuth2 authentication

CVE-2026-61397 · Severity: high · CVSS 7.5 · Published 2026-08-21

Apache CloudStack is a cloud management platform used by organizations to provision and manage virtual infrastructure. A vulnerability in its OAuth2 authentication plugin exposes sensitive user information to unauthorized attackers, potentially compromising credentials and user sessions that control access to critical cloud resources.

Technologies: Apache Cloudstack. Vendors: Apache.

Quick answers

Is CVE-2026-61397 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-61397 being exploited in the wild.
How severe is CVE-2026-61397?
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 through 4.20.3.0, 4.21.0.0 through 4.22.1.0.
Is there a fix for CVE-2026-61397?
A patch was published on 2026-08-21: Fixes available in CloudStack 4.20.3.1 and 4.22.1.1 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-61397 attacked?
It is attacked over the network.
Am I affected by CVE-2026-61397?
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

This vulnerability is an information disclosure flaw in Apache CloudStack's OAuth2 authentication plugin and Google OAuth integration. The vulnerability allows unauthorized actors to access sensitive information during the OAuth2 authentication flow. The issue affects versions 4.19.0.0 through 4.20.3.0 and 4.21.0.0 through 4.22.1.0. Patches are available in versions 4.20.3.1 and 4.22.1.1. The authentication nature of the component suggests the vulnerability is reachable to unauthenticated users during the login process.

Affected products

  • Apache CloudStack 4.19.0.0 through 4.20.3.0, 4.21.0.0 through 4.22.1.0

Timeline

  • 2026-08-21: disclosed
  • 2026-08-21: patched: Fixes available in CloudStack 4.20.3.1 and 4.22.1.1

References

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