CVE-2026-59655 Apache CloudStack: Unauthenticated OAuth provider client-secret disclosure
Unauthenticated attackers can disclose OAuth provider client secrets via the listing API in Apache CloudStack.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-59655?
CVE-2026-59655 is a high-severity vulnerability in Apache Cloudstack, published on 21 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-200
Which versions are affected by CVE-2026-59655?
It affects 1 product.
Products include Apache Cloudstack.
How do I fix CVE-2026-59655?
No fix has been published for CVE-2026-59655 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-59655 being exploited?
There is no known exploitation of CVE-2026-59655 in the wild and no public exploit code.
Other vulnerabilities in Apache Cloudstack
- CVE-2012-4501 Missing authorization in n/a
- CVE-2024-38346 Apache CloudStack: Unauthenticated cluster service port leads to remote execution
- CVE-2024-39864 Apache CloudStack: Integration API service uses dynamic port when disabled
- CVE-2024-29006 Apache CloudStack: x-forwarded-for HTTP header parsed by default
- CVE-2022-35741 Apache CloudStack SAML Single Sign-On XXE
Sources
Also known as GHSA-73gx-q9q8-7w92.