CVE-2026-94276: Apache APISIX: Openid-connect introspection validation issue

Severity: medium (CVSS 5.1 v4.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-10-01 · updated 2026-10-01
Weakness: CWE-287

Description

Improper Authentication vulnerability in Apache APISIX. On a route using openid-connect plugin with remote introspection against an authorization server that serves multiple issuers, a token that introspects as active for one issuer may get accepted on a route restricted to another. This issue affects Apache APISIX: from 3.12.0 through 3.18.0. Users are recommended to upgrade to version 3.19.0, which fixes the issue.

Affected products

Apache Software Foundation Apache APISIX: from 3.12.0 through 3.18.0

References

https://lists.apache.org/thread.html/txn3br25kl657fh15rwcy1oht1xbpyyk
http://www.openwall.com/lists/oss-security/2026/10/01/8

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