# CVE-2026-124666: Apache APISIX: Multi-auth preserves client-supplied Wolf identity headers

Status: published. Published: 2026-11-13. Updated: 2026-11-13.

Authentication bypass by spoofing vulnerability in Apache APISIX.



On a route where multi-auth falls back from wolf-rbac to another successful authenticator, client-supplied Wolf identity headers can remain in the request. A downstream service that relies on those documented headers may therefore receive an identity that was not established by the successful authenticator.



This issue affects Apache APISIX: from 3.8.0 through 3.19.0.



Users are recommended to upgrade to version 3.20.0, which fixes the issue.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- Apache Software Foundation / Apache APISIX (apache.org/apisix): ≥ 3.8.0; ≤ 3.19.0 (affected, semver). Source: CNA: apache

## Severity and prioritization

- CVSS 4.0: 6.4 (medium); CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N; source: CNA: apache

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: Not available

- Weaknesses: CWE-290

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://lists.apache.org/thread/1kpvbj2m069bnhod8rwyx0mdz5hkwkml (CNA: apache; vendor-advisory)

## Provenance

- CNA: apache: https://www.cve.org/CVERecord?id=CVE-2026-124666; retrieved 2026-11-13; source updated 2026-11-13

Revision: 6eb852733260fffd1adc45add9777f90645de3669a9c0ad1d0aecc7afc21ef61

Canonical: https://y2.dev/cve/CVE-2026-124666

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