CVE-2026-9561 Security feature bypass in Eclipse Kura
Attackers can spoof IP addresses in audit logs to bypass brute-force protections or trigger denial-of-service against third parties.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-9561?
CVE-2026-9561 is a high-severity vulnerability in Eclipse Kura, published on 14 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Eclipse Kura versions prior to 5.6.2 trust the client-supplied X-Forwarded-For HTTP header as the authoritative source of the client IP address in audit log entries. The org.eclipse.kura.web2 (Web Console) and org.eclipse.kura.rest.provider (REST API) components use this header as the primary IP source when initializing audit context, and org.eclipse.kura.jetty.customizer unconditionally installs Jetty's ForwardedRequestCustomizer on all HTTP/HTTPS connectors, causing HttpServletRequest.getRemoteAddr() to reflect the attacker-controlled header value. An unauthenticated remote attacker can exploit this vulnerability to bypass IP-based brute-force protections — such as fail2ban — by spoofing the logged IP address to a non-routable value, allowing a brute-force attack to proceed undetected, or to cause a denial of service against a third party by injecting a victim's IP address and triggering a ban on that address.
Which versions are affected by CVE-2026-9561?
It affects 1 product.
Products include Eclipse Kura.
How do I fix CVE-2026-9561?
No fix has been published for CVE-2026-9561 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-9561 being exploited?
There is no known exploitation of CVE-2026-9561 in the wild and no public exploit code.
Other vulnerabilities in Eclipse Kura
Sources
Also known as GHSA-fqc6-vqq8-5xwp.