CVE-2026-31908: Header injection vulnerability in Apache APISIX. The attacker can take advantage of certain configuration in…
CVE-2026-31908 · Severity: critical · CVSS 9.1 · Published 2026-04-14
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.
No. Junglewise Threat Intelligence has no report of CVE-2026-31908 being exploited in the wild.
How severe is CVE-2026-31908?
Critical severity, with a CVSS score of 9.1, published 14 April 2026.
Which products and versions are affected?
Apache APISIX. The advisory does not name versions.
Is there a fix for CVE-2026-31908?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
Am I affected by CVE-2026-31908?
Check whether you run Apache APISIX. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.