CVE-2026-59085
Received Received - Intake

Server-Side Request Forgery in Apache CloudStack

Publication date: 2026-08-21

Last updated on: 2026-08-21

Assigner: Apache Software Foundation

Description
Server-Side Request Forgery (SSRF) vulnerability in Apache CloudStack's webhook module, exploitable via webhook delivery requests. This issue affects Apache CloudStack: from 4.20.0.0 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.

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Meta Information

Published
2026-08-21
Last Modified
2026-08-21
Generated
2026-08-21
AI Q&A
2026-08-21
EPSS Evaluated
N/A
NVD
CVE-2026-59085
EUVD
EUVD-2026-63845

Affected Vendors & Products

Showing 4 associated CPEs
Vendor Product Version / Range
apache cloudstack From 4.20.0.0 (inc) to 4.20.3.0 (inc)
apache cloudstack From 4.21.0.0 (inc) to 4.22.1.0 (inc)
apache cloudstack 4.20.3.1
apache cloudstack 4.22.1.1

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-918 The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination.

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Executive Summary

This is a Server-Side Request Forgery (SSRF) vulnerability in Apache CloudStack's webhook module. It allows attackers to send crafted webhook delivery requests to force the server to make unauthorized requests to internal systems or services.

Detection Guidance

Detecting SSRF in Apache CloudStack requires checking for unusual webhook delivery requests targeting internal systems. Monitor logs for outbound requests from the webhook module to unexpected destinations. Look for patterns like requests to localhost, internal IP ranges, or metadata services. Enable verbose logging in CloudStack and inspect network traffic for anomalies.

Impact Analysis

An attacker could exploit this to access internal network resources, bypass firewalls, or interact with services not intended to be exposed. This may lead to data leaks, unauthorized actions, or further network compromise.

Compliance Impact

SSRF vulnerabilities can lead to unauthorized data access or exfiltration, violating confidentiality requirements in GDPR and HIPAA. Compliance may be impacted if sensitive data is exposed due to this flaw.

Mitigation Strategies

Immediately upgrade Apache CloudStack to version 4.20.3.1, 4.22.1.1, or later to patch the SSRF vulnerability. If upgrading is not immediately possible, disable the webhook module in CloudStack until the update is applied. Restrict outbound network access from the webhook service to prevent unauthorized requests.

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