Apache APISIX 3.19.x Path Traversal & Unintended Proxy (pre3.20)
CVE-2026-124726 Published on November 13, 2026

Apache APISIX: openapi-to-mcp tool call can reach an API path the document does not declare
Relative Path Traversal, with Unintended Proxy vulnerability in Apache APISIX. A caller of the MCP endpoint can invoke endpoints the OpenAPI document never declared, under the declared tool's HTTP method, using the credentials the Route adds. 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.

Vendor Advisory NVD

Vulnerability Analysis

CVE-2026-124726 is exploitable with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity and availability.

Exploitation:
NONE
Automatable:
NO
Technical Impact:
PARTIAL
Attack Vector:
NETWORK
Attack Complexity:
LOW
Privileges Required:
NONE
User Interaction:
NONE

Weakness Type

Relative Path Traversal

The software uses external input to construct a pathname that should be within a restricted directory, but it does not properly neutralize sequences such as ".." that can resolve to a location that is outside of that directory. This allows attackers to traverse the file system to access files or directories that are outside of the restricted directory.


Products Associated with CVE-2026-124726

Want to know whenever a new CVE is published for Apache Apisix? stack.watch will email you.

Apache Apisix

Affected Versions

Apache Software Foundation Apache APISIX:

Exploit Probability

EPSS
0.51%
Percentile
44.42%

EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.