Servers and applications

CVE-2026-124679

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

Severity: High 7.8
Published: 13 Nov 2026
Last changed: 13 Nov 2026
Added to UpHeron: 13 Nov 2026
Weakness: Authentication bypass by spoofing (CWE-290)
Attack: Over the network · No login needed · No user action needed
CVSS vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:L/SI:H/SA:N
Sources: CVE Program

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.

From the CVE Program.

Affected software

Software	Affected versions
Apache APISIXServers and applications · `cna:apache software foundation\|apache apisix`	From 3.18.0 up to 3.19.0

References

CVE.org https://www.cve.org/CVERecord?id=CVE-2026-124679