CVE-2026-31908

EUVD-2026-22225
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 recommended to upgrade to version 3.16.0, which fixes the issue.
Special Element Injection
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
apacheCNA
UNKNOWN
---
Base Score
CVSS 3.x
EPSS Score
Percentile: Unknown
Early Detection
Affected products identified ahead of NVD analysis through intelligence sources.
VendorProductVersionSource
apacheapisix
2.12.0 ≤
𝑥
≤ 3.15.0
CNA
Common Weakness Enumeration
References
https://lists.apache.org/thread/sob643s5lztov7x579j8o0c444t36n6b
http://www.openwall.com/lists/oss-security/2026/04/14/3