Quick answers
- Is CVE-2026-59654 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-59654 being exploited in the wild.
- How severe is CVE-2026-59654?
- High severity, with a CVSS score of 7.5, published 21 August 2026.
- Which products and versions are affected?
- Apache Cloudstack 4.7.0 through 4.20.3.0 and 4.21.0.0 through 4.22.1.0.
- Is there a fix for CVE-2026-59654?
- A patch was published on 2026-08-21: Fixed in versions 4.20.3.1, 4.22.1.1 and later Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-59654 attacked?
- It is attacked over the network, in a hosted service.
- Am I affected by CVE-2026-59654?
- 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
The vulnerability is a resource leak (missing release of resource after effective lifetime) in Apache CloudStack's scoped global configuration functionality, affecting modules such as Quota and Host-HA. The issue resides in the management server code and is triggered during normal configuration processing. An attacker with network access to the management server can exploit this by repeatedly triggering the affected configuration logic to exhaust server resources, resulting in denial of service. The vulnerability has been patched in versions 4.20.3.1, 4.22.1.1, and later.
Affected products
- Apache CloudStack 4.7.0 through 4.20.3.0 and 4.21.0.0 through 4.22.1.0
Timeline
- 2026-08-21: disclosed
- 2026-08-21: patched: Fixed in versions 4.20.3.1, 4.22.1.1 and later