CVE-2026-49871: Apache APISIX: cas-auth login CSRF / session injection issue

[Abhishek Choudhary <shreemaanabhishek () apache org>]

Severity: 

Affected versions:

- Apache APISIX 3.0.0 through 3.16.0

Description:

Cross-Site Request Forgery (CSRF) vulnerability in the cas-auth plugin under default configurations.

This defect allows a remote attacker that manages to send a victim to a webpage controlled by them can cause the 
victim's browser to become authenticated as a different identity.

Actions the victim takes upstream are then attributed to attackers identity.


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.

Credit:

lokerxxx (reporter)

References:

https://apisix.apache.org
https://www.cve.org/CVERecord?id=CVE-2026-49871