CVE-2026-49871

Critical

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.

SeverityCritical

CVSS9.3

Exploit probability—

Product

Apache Apisix

PublishedJun 19, 2026

First seenJun 19, 2026

Weakness typeCWE-352Cross-site request forgery (CSRF)

How to fix

Update

apache apisix3.17.0 or later

Vendor advisories

lists.apache.org/thread/1ozsnss0lof4gpwq763d66oxwxt3sycp

Affected products

Product	Affected versions	Fixed in
apache apisix	3.0.0 ≤ v < 3.17.0	3.17.0

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