CVE-2026-49871

EUVD-2026-38025

19.06.2026, 14:16

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.

CSRF

Provider	Type	Base Score	Atk. Vector	Atk. Complexity	Priv. Required	Vector
NIST	Primary	9.3 CRITICAL	NETWORK	LOW	NONE	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N

Base Score

CVSS 3.x

EPSS Score

Percentile: 17%

Affected Products (NVD)

Vendor	Product	Version
apache	apisix	3.0.0 ≤ 𝑥 < 3.17.0

𝑥

= Vulnerable software versions

Common Weakness Enumeration

CWE-352 - Cross-Site Request Forgery (CSRF)
The web application does not, or can not, sufficiently verify whether a well-formed, valid, consistent request was intentionally provided by the user who submitted the request.

References

https://lists.apache.org/thread/1ozsnss0lof4gpwq763d66oxwxt3sycp

http://www.openwall.com/lists/oss-security/2026/06/19/14