What is CVE-2026-44087?

CVE-2026-44087 is a critical-severity vulnerability in Apache Apisix, classified under Insufficient Verification of Data Authenticity. CVSS score: 9.1/10. Published 2026-06-19.

How severe is CVE-2026-44087?

Critical severity. CVSS v3 base score is 9.1 out of 10.

Vulnerability in Apache Apisix

CVE-2026-44087

Insufficient Verification of Data Authenticity vulnerability in Apache APISIX. The openid-connect plugin under default configuration has an attack surface that allows the attacker to spoof identity headers allowing the attacker to get unauthorized access the protected resources. This issue affects Apache APISIX: from 2.3 through 3.16.0. Users are recommended to upgrade to version 3.17.0, which fixes the issue.

Published 2026-06-19 · last modified 2026-06-23.

CVSS v3 metric

CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.

EPSS exploit prediction

EPSS: 0.003 (18.5th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 19th percentile — 18.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000

Affected products

Apache Apisix
Apache Software Foundation Apisix — versions 2.3

Weakness classification (CWE)

CWE-345 — Insufficient Verification of Data Authenticity

References

lists.apache.org/thread/72ryrgdssk6s2x9d6xn14bxyyl878xfm (vendor-advisory, Mailing List, Vendor Advisory)
af854a3a-2127-422b-91ae-364da2661108 (Third Party Advisory)

Frequently asked questions

What is CVE-2026-44087?: CVE-2026-44087 is a critical-severity vulnerability in Apache Apisix, classified under Insufficient Verification of Data Authenticity. CVSS score: 9.1/10. Published 2026-06-19.
How severe is CVE-2026-44087?: Critical severity. CVSS v3 base score is 9.1 out of 10.