Quick answers
- Is CVE-2026-59085 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-59085 being exploited in the wild.
- How severe is CVE-2026-59085?
- Critical severity, with a CVSS score of 9.1, published 21 August 2026.
- Which products and versions are affected?
- Apache Cloudstack 4.20.0.0 through 4.20.3.0, 4.21.0.0 through 4.22.1.0.
- Is there a fix for CVE-2026-59085?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-59085 attacked?
- It is attacked over the network, in a hosted service.
- Am I affected by CVE-2026-59085?
- 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 is a Server-Side Request Forgery (SSRF) vulnerability in Apache CloudStack's webhook module, triggered during webhook delivery requests. The vulnerability allows an attacker to craft malicious webhook payloads that force the CloudStack server to make requests to arbitrary internal or external hosts, potentially exposing internal services or enabling further attacks. The issue affects versions 4.20.0.0 through 4.20.3.0 and 4.21.0.0 through 4.22.1.0. No authentication bypass or other preconditions are explicitly required beyond the ability to trigger webhook delivery. Patches are available in versions 4.20.3.1 and 4.22.1.1 or later.
Affected products
- Apache CloudStack 4.20.0.0 through 4.20.3.0, 4.21.0.0 through 4.22.1.0
Timeline
- 2026-08-21: disclosed