CVE-2026-110723

API Gateway Bypass of Rate Limiting via Untrusted X-Forwarded-For Header

Published Oct 15, 2026 CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed
Description
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

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Eclipse
Eclipse connected Services Platform
Vendors & Products Eclipse
Eclipse connected Services Platform
Type Values Removed Values Added
Title API Gateway Bypass of Rate Limiting via Untrusted X-Forwarded-For Header
Type Values Removed Values Added
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}

ssvc

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

Type Values Removed Values Added
Description 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.
Weaknesses CWE-290
CWE-644
References
Weaknesses

Sources

Status
PUBLISHED
Assigner
eclipse
Published
Updated
Oct 15, 2026, 1:11 PM
Reserved
Oct 14, 2026, 2:52 PM
Status
Awaiting Analysis
Published
Oct 15, 2026, 1:17 PM
Modified
Oct 15, 2026, 2:41 PM