Improper Auth in Apache APISIX CAS-Auth Plugin (3.0.0-3.16.0)
CVE-2026-49872 Published on June 19, 2026
Apache APISIX: Improper authentication in cas-auth plugin
Improper Authentication vulnerability in Apache APISIX.
When the cas-auth plugin is used in a route, an attacker can possibly authenticate itself with credentials from a different source.
This issue affects Apache APISIX: from 3.0.0 through 3.16.0.
Users are recommended to upgrade to version 3.17.0, which fixes the issue.
Vulnerability Analysis
CVE-2026-49872 is exploitable with network access, and requires small amount of user privileges. 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.
Weakness Type
What is an authentification Vulnerability?
When an actor claims to have a given identity, the software does not prove or insufficiently proves that the claim is correct.
CVE-2026-49872 has been classified to as an authentification vulnerability or weakness.
Products Associated with CVE-2026-49872
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Affected Versions
Apache Software Foundation Apache APISIX:- Version 3.0.0, <= 3.16.0 is affected.
Exploit Probability
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.