CVE-2026-31908

CRITICAL

9.1

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.

CVE Details

CVSS v3.1 Score9.1

SeverityCRITICAL

CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredNONE

User InteractionNONE

Published4/14/2026

Last Modified4/17/2026

Sourcenvd

Honeypot Sightings0

Affected Products

apache:apisix

Weaknesses (CWE)

CWE-75

References

https://lists.apache.org/thread/sob643s5lztov7x579j8o0c444t36n6b(security@apache.org)

http://www.openwall.com/lists/oss-security/2026/04/14/3(af854a3a-2127-422b-91ae-364da2661108)

IOC Correlations

No correlations recorded

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