---
title: "CVE-2026-110723: api-gateway - Broken Access Control"
description: "api-gateway <= 1.7.3 contains a broken access control caused by unvalidated use of the leftmost element of X-Forwarded-For header in ClientIpKeyResolver, letting attackers bypass request-rate limiting, exploit requires attacker to control X-Forwarded-For header."
url: https://panop.io/threat-heartbeat/CVE-2026-110723/
---

# CVE-2026-110723 api-gateway - Broken Access Control

api-gateway <= 1.7.3 contains a broken access control caused by unvalidated use of the leftmost element of X-Forwarded-For header in ClientIpKeyResolver, letting attackers bypass request-rate limiting, exploit requires attacker to control X-Forwarded-For header.

CVSS base score 7.5 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-110723)

## Details

Type

Broken Access Control

Impact

Denial Of Service

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Published

15 October 2026

Updated

15 October 2026

Weakness

[CWE-290](https://cwe.mitre.org/data/definitions/290.html)

## Vendor fix

Update to a version later than 1.7.3 or apply a fix that validates X-Forwarded-For against trusted proxies.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-110723](https://nvd.nist.gov/vuln/detail/CVE-2026-110723)
- [https://github.com/eclipse-ecsp/api-gateway/pull/330](https://github.com/eclipse-ecsp/api-gateway/pull/330)
- [https://github.com/eclipse-ecsp/api-gateway/security/advisories/GHSA-m468-w7pr-f39w](https://github.com/eclipse-ecsp/api-gateway/security/advisories/GHSA-m468-w7pr-f39w)
- [https://gitlab.eclipse.org/security/cve-assignment/-/work\_items/406](https://gitlab.eclipse.org/security/cve-assignment/-/work_items/406)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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