---
id: "CVE-2026-124680"
page: "https://infrastack.ai/live/CVE-2026-124680"
kind: "vulnerability"
aliases: ["CVE-2026-124680"]
title: "Apache APISIX: encoded dot segments let clients skip route auth plugins"
severity: "high"
cvss: 7.0
epss: null
exploited: false
status: "open"
category: "infrastructure"
products: []
ecosystems: []
tags: ["apache-apisix", "api-gateway", "infrastructure", "self-hosted"]
not_affected_if: ["single-route-per-upstream", "upstream-collapses-dot-segments"]
published_at: "2026-11-13T18:17:31+00:00"
first_seen_at: "2026-11-13T18:49:29+00:00"
updated_at: "2026-11-13T18:51:37+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-124680", "first_seen_at": "2026-11-13T18:49:29+00:00"}]
exploit_sources: []
---

# Apache APISIX: encoded dot segments let clients skip route auth plugins

Link for people: https://infrastack.ai/live/CVE-2026-124680 (this .md is for agents)

Apache APISIX can let an unauthenticated client reach upstream paths that a route-level auth plugin should protect, when a route without auth shares the same upstream. The flaw is an incorrect authorization caused by how encoded dot segments in request paths are interpreted.

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

## How to check

- Check the APISIX version with `apisix version` or the image tag; affected versions run from 0.9 through `3.19.0`.
- List routes that share an upstream and look for one route with an auth plugin and another without it.
- Check whether the upstream collapses encoded dot segments (`%2e%2e`); the sources do not say how to test this.

## Fix

- Upgrade Apache APISIX to `3.20.0` or later.

## Timeline

- 2026-11-13T18:49:29+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-124680

## From the sources

Interpretation Conflict, resulting in (Incorrect Authorization) vulnerability in Apache APISIX.



An unauthenticated client can reach upstream paths protected
by a route-level auth plugin when a route without auth exists on the
same upstream and the upstream does not collapse encoded dot segments.



This issue affects Apache APISIX: from 0.9 through 3.19.0.



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

---

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