CVE-2026-114638 Traefik v3.7.0 before v3.7.14 Client CA Mix-up via auth-tls-secret Name Collision
High 7.0
Published
Updated
Check this codebase for CVE-2026-114638 and fix it if it is affected.
What it is: CVE-2026-114638 is a high-severity vulnerability in Traefik Traefik, published on 22 Oct 2026.
Exploitation: There is no known exploitation of CVE-2026-114638 in the wild and no public exploit code.
Affected product: Traefik Traefik. No package-level version data is available, so check the vendor advisory linked from the reference page.
Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.
Reference: https://insights.sbomify.com/CVE-2026-114638/ (Markdown: https://insights.sbomify.com/CVE-2026-114638/index.md)
- Exploited in the wild
- Not known
- Fix
- Available
What is CVE-2026-114638?
CVE-2026-114638 is a high-severity vulnerability in Traefik Traefik, published on 22 Oct 2026.
Official 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.
Weakness: CWE-287
Which versions are affected by CVE-2026-114638?
It affects 1 product.
Products include Traefik Traefik.
How do I fix CVE-2026-114638?
Upgrade to a fixed version.
Is CVE-2026-114638 being exploited?
There is no known exploitation of CVE-2026-114638 in the wild and no public exploit code.
Other vulnerabilities in Traefik Traefik
- CVE-2024-45410 HTTP client can remove the X-Forwarded headers in Traefik
- CVE-2026-88877 Traefik v3.7.0 Authentication Bypass via from-to-www-redirect
- CVE-2026-85595 Traefik before v2.11.55 and v3.0.0 through v3.7.10 Authentication Bypass via digestAuth
- CVE-2026-88007 Traefik HTTP/3 Backend NTLM Connection Reuse
- CVE-2026-88009 Traefik: Rootless HTTP/1 request-target routes as "/" but is forwarded verbatim, bypassing path-scoped routing, middleware guards and access logging
Sources
Also known as GHSA-378g-rwj7-qp6j, GHSA-rv2h-qh7j-xrjw.