Vulnerability in Apache Apisix
CVE-2026-31908
Header injection vulnerability in Apache APISIX. The attacker can take advantage of certain configuration in forward-auth plugin to inject malicious headers. This issue affects Apache APISIX: from 2.12.0 through 3.15.0. Users are recomme…
EPSS: 0.005 (40.8th percentile) — read the EPSS interpretation.
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.
Affected products
- Apache Apisix
- Apache Software Foundation Apisix — versions 2.12.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- security@apache.org (vendor-advisory, Mailing List, Vendor Advisory)
- af854a3a-2127-422b-91ae-364da2661108 (Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2026-31908?
- CVE-2026-31908 is a critical-severity vulnerability in Apache Apisix, classified under CWE-75. CVSS score: 9.1/10. Published 2026-04-14.
- How severe is CVE-2026-31908?
- Critical severity. CVSS v3 base score is 9.1 out of 10.
- Is CVE-2026-31908 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.