Cross-site request forgery in Apache APISIX - CVE-2026-49871
Published: August 25, 2026
Vulnerability identifier: #VU145253
CSH Severity: Low
CVSS v4: 4.6 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-49871
CWE-ID: CWE-352
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause actions taken by the victim upstream to be attributed to the attacker's identity.
The vulnerability exists due to cross-site request forgery in the cas-auth plugin when handling login requests under default configurations. A remote attacker can send the victim to a webpage controlled by them to cause actions taken by the victim upstream to be attributed to the attacker's identity.
The victim's browser can become authenticated as a different identity.
Affected software
Apache APISIX
How to mitigate CVE-2026-49871
Install security update from vendor's website.
Apache APISIX - update to 3.17.0