# CVE-2026-9561: Eclipse Kura IP spoofing via X-Forwarded-For header

Source: https://junglewise.ai/threats/cve-2026-9561-eclipse-kura-ip-spoofing-via-x-forwarded-for-header  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-07-14. Updated: 2026-07-14  
License: CC BY 4.0 with a link back

CVE-2026-9561 · Severity: info · CVSS 8.8 · Published 2026-07-14

Eclipse Kura, an open-source framework for IoT gateways, contains a flaw that allows attackers to fake their network location. By manipulating technical headers in web requests, an attacker can hide their true identity from security logs or trick the system into blocking innocent third parties. This can be used to bypass security protections that prevent password guessing or to disrupt service for legitimate users.

Vendors: [Eclipse Foundation](https://junglewise.ai/threats/vendors/eclipse-foundation).

## Quick answers

**Is CVE-2026-9561 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-9561 being exploited in the wild.

**How severe is CVE-2026-9561?** Informational severity, with a CVSS score of 8.8, published 14 July 2026.

**Which products and versions are affected?** Eclipse Foundation Kura 5.0.0 to 5.6.1.

**Is there a fix for CVE-2026-9561?** A patch was published on 2026-07-14: Version 5.6.2 released Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-9561 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2026-9561?** Check whether you run Eclipse Foundation Kura 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

Eclipse Kura (versions 5.0.0 through 5.6.1) incorrectly trusts the 'X-Forwarded-For' HTTP header as the authoritative source for client IP addresses. The vulnerability exists because the 'org.eclipse.kura.jetty.customizer' component unconditionally installs Jetty's 'ForwardedRequestCustomizer', which causes 'HttpServletRequest.getRemoteAddr()' to return attacker-controlled values. This affects the Web Console and REST API components. An unauthenticated remote attacker can exploit this to bypass IP-based rate limiting (like fail2ban) by spoofing non-routable IPs, or perform a Denial of Service (DoS) by spoofing a victim's IP to trigger an automated ban. The issue is resolved in version 5.6.2.

## Affected products

- Eclipse Foundation Kura 5.0.0 to 5.6.1

## Timeline

- 2026-07-14: advisory: NVD publication date
- 2026-07-14: disclosed: Initial CVE publication
- 2026-07-14: patched: Version 5.6.2 released

## References

- [https://gitlab.eclipse.org/security/cve-assignment/-/work_items/117](https://gitlab.eclipse.org/security/cve-assignment/-/work_items/117)