CVE-2026-31908
Apache APISIX: forward auth plugin allows header injection
9.1
CRITICAL
CVSS 3.1
EPSS 0.04%
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.
How to fix CVE-2026-31908
To remediate CVE-2026-31908, upgrade the affected package to a fixed version below.
- —upgrade to 3.16.0 or later
Is CVE-2026-31908 being exploited?
Low — EPSS is 0.0%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- >= 2.12.0, < 3.16.0
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | CRITICAL9.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N |