CVE-2026-9561

Published Jul 14, 2026 CVSS 4.0 · 8.8 High EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
CPEs cpe:2.3:a:eclipse:kura:*:*:*:*:*:*:*:*
Metrics cvssV3_1

{'score': 8.2, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L'}

Type Values Removed Values Added
Title X-Forwarded-For Header Spoofing Enables IP-Based Brute-Force and Denial of Service in Eclipse Kura
Type Values Removed Values Added
Title X-Forwarded-For Header Spoofing Enables IP-Based Brute-Force and Denial of Service in Eclipse Kura
Type Values Removed Values Added
Title IP Spoofing via X-Forwarded-For Header to Bypass Brute-Force Protection and Cause Denial of Service
Type Values Removed Values Added
Title IP Spoofing via X-Forwarded-For Header to Bypass Brute-Force Protection and Cause Denial of Service
Type Values Removed Values Added
Title Eclipse Kura IP Header Spoofing Allows Brute‑Force Bypass and Denial of Service
Type Values Removed Values Added
Title Eclipse Kura IP Header Spoofing Allows Brute‑Force Bypass and Denial of Service
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Eclipse
Eclipse kura
Vendors & Products Eclipse
Eclipse kura
Type Values Removed Values Added
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.
Weaknesses CWE-345
CWE-348
CWE-807
References
Metrics cvssV4_0

{'score': 8.8, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
eclipse
Published
Updated
Jul 14, 2026, 12:22 PM
Reserved
May 26, 2026, 10:32 AM
Status
Analyzed
Published
Jul 14, 2026, 9:16 AM
Modified
Oct 24, 2026, 9:10 PM