# CVE-2026-114636: Traefik Kubernetes Ingress NGINX provider access-control bypass in ssl-passthrough

Source: https://junglewise.ai/threats/cve-2026-114636-traefik-v3-7-13-before-v3-7-14-contains-an-access-control-bypass  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-22. Updated: 2026-10-22  
License: CC BY 4.0 with a link back

CVE-2026-114636 · Severity: high · CVSS 8.7 · Published 2026-10-22

Traefik is a reverse proxy and load balancer commonly used to route traffic in Kubernetes environments. In versions 3.7.13, a misconfiguration in the Kubernetes Ingress NGINX provider allows attackers to bypass authentication protections on backends when ssl-passthrough is enabled, accessing protected services without credentials. This can expose sensitive data or allow unauthorized actions on protected applications.

Technologies: [Traefik Labs Traefik](https://junglewise.ai/threats/technologies/traefik-labs-traefik). Vendors: [Traefik Labs](https://junglewise.ai/threats/vendors/traefik-labs).

## Quick answers

**Is CVE-2026-114636 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-114636 being exploited in the wild.

**How severe is CVE-2026-114636?** High severity, with a CVSS score of 8.7, published 22 October 2026.

**Which products and versions are affected?** Traefik Labs Traefik v3.7.13.

**Is there a fix for CVE-2026-114636?** Yes: fixed in v3.7.14. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-114636 attacked?** It is attacked over the network.

**Am I affected by CVE-2026-114636?** Check whether you run Traefik Labs Traefik at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- Fixed in v3.7.14

## Technical details

When an Ingress resource carries the nginx.ingress.kubernetes.io/ssl-passthrough annotation in Traefik v3.7.13, an HTTP router is created on non-TLS entry points but is built outside regular rule processing, causing access-control annotations (auth-type, auth-url, whitelist-source-range) to be parsed but never applied as middlewares. An unauthenticated network attacker can reach the HTTP entry point with the Ingress host and access the protected backend with no authentication or source restrictions enforced. The vulnerability is fixed in v3.7.14.

## Affected products

- Traefik Labs Traefik v3.7.13

## Timeline

- 2026-10-07: disclosed
- 2026-10-21: advisory
- 2026-10-22: patched

## References

- [https://github.com/traefik/traefik/security/advisories/GHSA-qvj7-gq9c-hp7q](https://github.com/traefik/traefik/security/advisories/GHSA-qvj7-gq9c-hp7q)
- [https://www.vulncheck.com/advisories/traefik-3.7.13-authentication-bypass-via-ssl-passthrough-ingress-http-router](https://www.vulncheck.com/advisories/traefik-3.7.13-authentication-bypass-via-ssl-passthrough-ingress-http-router)

## Related threats

- [Traefik authorization bypass in Kubernetes Ingress NGINX provider](https://junglewise.ai/threats/cve-2026-119573-traefik-3-7-11-before-3-7-15-contains-an-authorization-bypass-in)
- [Traefik ingress-nginx provider mTLS authentication bypass](https://junglewise.ai/threats/cve-2026-119572-traefik-from-3-7-0-ea-1-before-3-7-15-contains-an-authentication)
- [Traefik Ingress-NGINX mTLS identity spoofing via forged headers](https://junglewise.ai/threats/cve-2026-114640-traefik-from-v3-7-0-before-v3-7-14-contains-an-authentication)
- [Traefik Kubernetes Ingress NGINX provider authentication bypass via TLS secret name collision](https://junglewise.ai/threats/cve-2026-114638-traefik-v3-7-0-before-v3-7-14-contains-an-improper)
- [Traefik FastProxy NTLM/Negotiate authentication bypass in connection pool](https://junglewise.ai/threats/cve-2026-114637-traefik-from-v3-2-0-before-v3-7-14-contains-an-authentication)