CVE-2026-9561
HighCVSS 8.2Exploitation Probability (EPSS)
Low risk11th percentile - higher than 11% of all known CVEs
Summary
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 Web Console and REST API components use this header for audit context initialization, and Jetty's ForwardedRequestCustomizer is unconditionally installed, allowing an attacker to control the logged IP address.
Risk Assessment
An unauthenticated remote attacker can bypass IP-based brute-force protections (e.g., fail2ban) by spoofing the IP address to a non-routable value, enabling an undetected brute-force attack. The attacker can also cause a denial of service against a third party by injecting a victim's IP address and triggering a ban on that address.
Recommendation
Upgrade Eclipse Kura to version 5.6.2 or later immediately. If an upgrade is not possible, configure a trusted proxy (e.g., reverse proxy) to validate the X-Forwarded-For header before forwarding requests to the application.
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Original NVD description (English source)
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.