CVE-2026-49871

CRITICAL

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

Title source: cna
STIX 2.1

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.

References (2)

Core 2

Scores

CVSS v3 9.3
EPSS 0.0026
EPSS Percentile 17.4%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-352
Status published
Products (2)
apache/apisix 3.0.0 - 3.17.0
Apache Software Foundation/Apache APISIX 3.0.0 - 3.16.0
Published Jun 19, 2026
Tracked Since Jun 19, 2026