What is CVE-2026-49871?

CVE-2026-49871 is a critical-severity vulnerability in Apache Apisix, classified under Cross-Site Request Forgery (CSRF). CVSS score: 9.3/10. Published 2026-06-19.

How severe is CVE-2026-49871?

Critical severity. CVSS v3 base score is 9.3 out of 10.

CSRF in Apache Apisix

CVE-2026-49871

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 beco…

Vulnerability class: CSRF (Cross-Site Request Forgery)

EPSS: 0.003 (17.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.3 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N.

Affected products

Apache Apisix
Apache Software Foundation Apisix — versions 3.0.0

Weakness classification (CWE)

CWE-352 — Cross-Site Request Forgery (CSRF)

References

security@apache.org (vendor-advisory, Mailing List, Vendor Advisory)
af854a3a-2127-422b-91ae-364da2661108 (Third Party Advisory)

Frequently asked questions

What is CVE-2026-49871?: CVE-2026-49871 is a critical-severity vulnerability in Apache Apisix, classified under Cross-Site Request Forgery (CSRF). CVSS score: 9.3/10. Published 2026-06-19.
How severe is CVE-2026-49871?: Critical severity. CVSS v3 base score is 9.3 out of 10.