CVE-2026-124679Apache APISIX: jwe-decrypt and forward-auth may pass a client-supplied identity header

Description

Authentication bypass by spoofing vulnerability in Apache APISIX. On routes using jwe-decrypt with strict: false and a forward_header distinct from the token header an unauthenticated client can supply the value the upstream treats as gateway-decrypted plaintext. Similar can happen when forward-auth is configured with allow_degradation: true, and the auth service is unavailable. This issue affects Apache APISIX: from 3.18.0 through 3.19.0. Users are recommended to upgrade to version 3.20.0, which fixes the issue.

Data: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Published as the sources state it, in English.

Affected products and versions

References and patches

• https://lists.apache.org/thread/jmktj1o0rrxf1rdbptk0j3c4h0vdws96 vendor-advisory
• http://www.openwall.com/lists/oss-security/2026/11/13/6