---
id: "CVE-2026-124719"
page: "https://infrastack.ai/live/CVE-2026-124719"
kind: "vulnerability"
aliases: ["CVE-2026-124719"]
title: "Apache APISIX: header spoofing lets callers act as other identities"
severity: "low"
cvss: 2.3
epss: null
exploited: false
status: "open"
category: "infrastructure"
products: []
ecosystems: []
tags: ["apache-apisix", "api-gateway", "infrastructure", "self-hosted"]
not_affected_if: ["default-config"]
published_at: "2026-11-13T18:17:31+00:00"
first_seen_at: "2026-11-13T18:49:29+00:00"
updated_at: "2026-11-13T18:52:01+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-124719", "first_seen_at": "2026-11-13T18:49:29+00:00"}]
exploit_sources: []
---

# Apache APISIX: header spoofing lets callers act as other identities

Link for people: https://infrastack.ai/live/CVE-2026-124719 (this .md is for agents)

Apache APISIX, an API gateway, can be tricked into trusting a caller identity header, so a caller can act as another identity against the upstream API. The sources say this affects versions from 3.19.0 before 3.20.0 when a Route's configured headers carry a caller identity and the OpenAPI document declares the same header.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Check the installed APISIX version (`apisix version` or the image tag) and see whether it is between `3.19.0` and `3.20.0`.
- Look for Routes whose configured headers carry a caller identity and whose OpenAPI document declares the same header.

## Fix

- Apache APISIX: upgrade to `3.20.0`.

## Timeline

- 2026-11-13T18:49:29+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-124719

## From the sources

Authentication bypass by spoofing vulnerability in Apache APISIX.



When a Route's configured headers carry a caller identity and the OpenAPI document declares
the same header, a caller can act as another identity against the
upstream API. This issue affects Apache APISIX: from 3.19.0 before 3.20.0.



Users are recommended to upgrade to version 3.20.0, which fixes the issue.

---

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