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.
Fix
Public exploits 1
- MehranTurk/CVE-2026-31908 PoC on GitHub
Each line links to the index that lists it, never to exploit code. Exploit-DB's "verified" and a Metasploit rank of good or better count as verified; a PoC-in-GitHub entry is a repository's claim.
Patch, vendor advisory and mitigation references on NVD 1
- https://lists.apache.org/thread/sob643s5lztov7x579j8o0c444t36n6b Mailing List, Vendor Advisory
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 1
- First seenCVSS 9.1 · apacheNVD modified 2026-10-26 21:10
Affected (CPE criteria) 1
cpe:2.3:a:apache:apisix:*:*:*:*:*:*:*:*
References 2
- https://lists.apache.org/thread/sob643s5lztov7x579j8o0c444t36n6b Mailing List, Vendor Advisory
- http://www.openwall.com/lists/oss-security/2026/04/14/3 Mailing List, Third Party Advisory