CVE-2026-49871: Apache APISIX

Critical severity, CVSS 9.3. EPSS: 0.4% chance of exploitation in the next 30 days.

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.

Affected products

• Apache APISIX: from 3.0.0, before 3.17.0 (fixed in 3.17.0)

Published 2026-06-19. Last modified 2026-06-23.