CVE-2026-84175
Received Received - Intake

Arbitrary HTTP Requests via Unvalidated WoT ThingModels in Eclipse Ditto

Publication date: 2026-09-02

Last updated on: 2026-09-02

Assigner: Eclipse Foundation

Description
In Eclipse Ditto versions 3.0.0 to 3.9.6, the Things service fetches WoT (Web of Things) ThingModels over HTTP from URLs supplied by API users in the definition field of a Thing or Feature, without validating the target host, and follows HTTP redirects without re-validating the redirect target and without a hop limit. An authenticated user who is permitted to create a Thing, or who holds WRITE permission on an existing Thing, can thereby cause the Things service to issue arbitrary HTTP GET requests from inside the deployment's network — including to cloud instance-metadata endpoints and other internal services — and can use the differing error responses returned to the caller to enumerate internal services. Versions 2.4.0 to 2.5.x contain the same code, but are only affected where the operator explicitly enabled the WoT integration feature toggle, which is disabled by default in those versions.

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Meta Information

Published
2026-09-02
Last Modified
2026-09-02
Generated
2026-09-02
AI Q&A
2026-09-02
EPSS Evaluated
N/A
NVD
CVE-2026-84175
EUVD
EUVD-2026-69894

Affected Vendors & Products

Showing 4 associated CPEs
Vendor Product Version / Range
eclipse ditto From 3.0.0 (inc) to 3.9.6 (inc)
eclipse ditto From 2.4.0 (inc) to 2.5.x (inc)
eclipse ditto to 3.9.7 (exc)
eclipse ditto to 3.8.13 (exc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-674 The product does not properly control the amount of recursion that takes place, consuming excessive resources, such as allocated memory or the program stack.
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.

Attack-Flow Graph

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Executive Summary

CVE-2026-84175 is a Server-Side Request Forgery (SSRF) vulnerability in Eclipse Ditto versions 3.0.0 to 3.9.6. An authenticated user with write access to a Thing or Feature can supply an arbitrary HTTP or HTTPS URL in the definition field. The Things service fetches this URL without host validation, allowing requests to internal endpoints like cloud metadata services or Kubernetes APIs. The vulnerability also involves uncontrolled HTTP redirect following, enabling internal port scanning and potential data exposure.

Detection Guidance

Monitor network traffic from Eclipse Ditto pods for unexpected outbound HTTP requests to internal endpoints. Check logs for HTTP 421 or 400 responses indicating SSRF attempts. Use tools like tcpdump or Wireshark to inspect traffic from Ditto containers. Review API logs for POST/PUT requests to /api/2/things with definition fields containing URLs.

Impact Analysis

This vulnerability allows attackers to make arbitrary HTTP requests from inside your network, potentially accessing internal services like cloud metadata endpoints or Kubernetes APIs. It can be used for internal port scanning, data exfiltration, or denial-of-service via redirect loops. Exploitation requires only standard API write access, not admin privileges.

Compliance Impact

This vulnerability could potentially violate compliance with GDPR and HIPAA by enabling unauthorized access to internal services and data. SSRF attacks may expose sensitive internal endpoints, leading to data breaches or unauthorized data retrieval, which are critical violations under both regulations. The ability to enumerate internal services and make arbitrary requests increases the risk of accessing protected health information (PHI) or personal data without authorization.

Mitigation Strategies

Upgrade Eclipse Ditto to versions 3.9.7 or 3.8.13 or later. Disable the WoT integration feature if not needed. Apply network policies to restrict outbound traffic from Ditto pods. Limit WRITE permissions on Things and Features to trusted users only. Monitor for unusual HTTP requests or redirect loops in logs.

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