# CVE-2026-31908

## Summary

- **CVE ID:** CVE-2026-31908
- **Severity:** CRITICAL
- **CVSS Score:** 9.1 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N)
- **CWE:** CWE-75
- **Published:** Apr 14, 2026
- **Last Modified:** Apr 16, 2026

## Description

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.

## Affected Products

- Apache Software Foundation — Apache APISIX (2.12.0)

## References

- [CNA](https://lists.apache.org/thread/sob643s5lztov7x579j8o0c444t36n6b)
- [CVE](http://www.openwall.com/lists/oss-security/2026/04/14/3)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.52%
- **EPSS Percentile:** 42.5

---
_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._