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

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

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.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- Apache Software Foundation / Apache APISIX (apache.org/apisix): ≥ 3.18.0; ≤ 3.19.0 (affected, semver). Source: CNA: apache

## Severity and prioritization

- CVSS 4.0: 7.8 (high); 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; 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/jmktj1o0rrxf1rdbptk0j3c4h0vdws96 (CNA: apache; vendor-advisory)

## Provenance

- CNA: apache: https://www.cve.org/CVERecord?id=CVE-2026-124679; retrieved 2026-11-13; source updated 2026-11-13

Revision: d1761140d4ddcbbe3afd85abbfe77e28c0027ec4cde8b6a2c064af00ef724d88

Canonical: https://y2.dev/cve/CVE-2026-124679

## Agent and API access

Public CVE pages, Markdown, and JSON are free to read without an account or API key.

- Public catalog: https://y2.dev/cve/index.json. Follow nextCursor with the same search, filters, sort, and limit (1–100). A null cursor marks the end.

- WebMCP: search_cve_disclosures, get_cve_disclosure, get_cve_page_markdown, get_y2_cve_access. Available in compatible browsers.

- Cyber API: https://api.y2.dev/api/v2/cyber/cves and https://api.y2.dev/api/v2/cyber/cves/{cveId}.

- Y2 Pro or Elite: create a workspace API key with the intel:cyber scope and send Authorization: Bearer <Y2_API_KEY>. Setup: https://y2.dev/docs/api/create-key.

- x402: Pay per request without an account or API key. Omit Authorization, read the HTTP 402 PAYMENT-REQUIRED challenge, validate its current requirements, and retry with PAYMENT-SIGNATURE through an authorized payment client. These browser tools never make payments. Guide: https://y2.dev/docs/api/x402.

- OpenAPI: https://y2.dev/api/openapi.yaml. Agent access metadata: https://y2.dev/cve/agent.json.

Collected public records only. Check source status for coverage and freshness.