---
id: CVE-2026-110726
title: >-
  In `api-gateway` versions till `1.7.3`, The default rate-limit key resolver,
  `ClientIpKeyResolver`, derives the per-client bucket key from the leftmost
  element of the `X-Forwarded-For` request header
summary: >-
  In `api-gateway` versions till `1.7.3`, The default rate-limit key resolver,
  `ClientIpKeyResolver`, derives the per-client bucket key from the leftmost
  element of the `X-Forwarded-For` request header. That element is supplied by
  the orig…
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-348
  - CWE-770
  - CWE-807
vendor: Eclipse Foundation
product: Eclipse Connected Services Platform
affected:
  - eclipse_connected_services_platform >= 1.5.4 <= 1.7.3
published: '2026-10-15'
updated: '2026-10-15'
sourceUpdated: '2026-10-15T16:17:46.283'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-110726'
references:
  - url: 'https://github.com/eclipse-ecsp/api-gateway/pull/330'
    label: emo@eclipse.org
  - url: >-
      https://github.com/eclipse-ecsp/api-gateway/security/advisories/GHSA-ch6x-rg7q-7jfx
    label: emo@eclipse.org
  - url: 'https://gitlab.eclipse.org/security/cve-assignment/-/work_items/404'
    label: emo@eclipse.org
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-10-15T15:30:07.394578Z'
ingestedAt: '2026-10-15T12:03:44.067Z'
epss: 0.00192
epssPercentile: 0.08784
---

## Overview

In `api-gateway` versions till `1.7.3`, The default rate-limit key resolver, `ClientIpKeyResolver`, derives the per-client bucket key from the leftmost element of the `X-Forwarded-For` request header. That element is supplied by the originating HTTP client and is not validated against any trusted-proxy list. A single attacker can therefore obtain an unlimited number of independent rate-limit buckets — one per unique header value — and completely bypass the gateway's request-rate limiting on every route that uses the shipped default configuration.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.