# CVE-2026-65613: Apache CloudStack information disclosure in Webhook module

Source: https://junglewise.ai/threats/cve-2026-65613-apache-cloudstack-information-disclosure-in-webhook-module  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-08-21. Updated: 2026-09-25  
License: CC BY 4.0 with a link back

CVE-2026-65613 · Severity: medium · CVSS 4.3 · Published 2026-08-21

Apache CloudStack's Webhook feature allows administrators to trigger automated actions when certain events occur. A flaw in the module that lists and deletes webhook deliveries exposes sensitive information to unauthorized users who can interact with the affected API endpoints, potentially revealing details about system events and automated workflows.

Technologies: [Apache Cloudstack](https://junglewise.ai/threats/technologies/cloudstack). Vendors: [Apache](https://junglewise.ai/threats/vendors/apache).

## Quick answers

**Is CVE-2026-65613 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-65613 being exploited in the wild.

**How severe is CVE-2026-65613?** Medium severity, with a CVSS score of 4.3, 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-2026-65613?** 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-2026-65613 attacked?** It is attacked over the network.

**Am I affected by CVE-2026-65613?** 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 Webhook module, specifically in the functionality that lists and deletes webhook delivery records. The vulnerability allows unauthorized actors to access sensitive information through the affected endpoints without proper authorization checks. The issue affects versions 4.20.0.0 through 4.20.3.0 and 4.21.0.0 through 4.22.1.0. Users should upgrade to version 4.20.3.1, 4.22.1.1, or later to remediate the issue.

## 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

## References

- [https://lists.apache.org/thread/g6cwddtjrwbh1d56wjz4cfp3fzfm4kbc](https://lists.apache.org/thread/g6cwddtjrwbh1d56wjz4cfp3fzfm4kbc)

## Related threats

- [Apache CloudStack resource leak in scoped global configuration](https://junglewise.ai/threats/cve-2026-59654-apache-cloudstack-resource-leak-in-scoped-global-configuration)
- [Apache CloudStack certificate validation bypass in SAML authentication](https://junglewise.ai/threats/cve-2026-68745-apache-cloudstack-certificate-validation-bypass-in-saml)
- [Apache CloudStack improper access control in annotation APIs](https://junglewise.ai/threats/cve-2026-66797-apache-cloudstack-improper-access-control-in-annotation-apis)
- [Apache CloudStack improper authorization in project role management](https://junglewise.ai/threats/cve-2026-66722-apache-cloudstack-improper-authorization-in-project-role)
- [Apache CloudStack authorization bypass in host tags listing](https://junglewise.ai/threats/cve-2026-66721-apache-cloudstack-authorization-bypass-in-host-tags-listing)