Critical 9.1Published Apr 14, 2026

CVE-2026-31908Apache APISIX: forward auth plugin allows header injection

Updated under an hour ago (Oct 26, 2026, 3:50 PM ET)

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It affects Apache Software Foundation Apache APISIX and 1 other product. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for Apache Software Foundation Apache APISIX

Exploited in the last 30 days

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.

CVSS: 9.1 CRITICAL (v3.1, CISA ADP)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Weakness (CWE): CWE-75
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: apache
NVD analysis: Analyzed
Record last updated: Apr 16, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Apache Software Foundation Apache APISIX apache_software_foundation:apache_apisix (from the name)	from 2.12.0 through 3.15.0	CNA record
apache apisix apache:apisix	from 2.12.0 before 3.16.0	NVD

References

References

https://lists.apache.org/thread/sob643s5lztov7x579j8o0c444t36n6b	vendor-advisory, mailing-list
http://www.openwall.com/lists/oss-security/2026/04/14/3	mailing-list, third-party-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.