# CVE-2026-119573: Traefik 3.7.11 before 3.7.15 Cross-Namespace Authorization Bypass via auth-tls-secret


- **Severity:** Low 2.1 (`CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:N/VI:L/VA:N/SC:L/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Fix available:** No
- **Published:** 30 Oct 2026
- **Updated:** 30 Oct 2026
- **Also known as:** GHSA-28hp-c82p-8vqj, GHSA-mvh9-fv5r-qhpj

## What is CVE-2026-119573?

CVE-2026-119573 is a low-severity vulnerability in Traefik, published on 30 Oct 2026. 

### Official description

Traefik 3.7.11 before 3.7.15 contains an authorization bypass in the Kubernetes Ingress NGINX provider that skips the cross-namespace check on the auth-tls-secret annotation when a cached client authentication TLS option is reused. Users who can create Ingresses can reference another namespace's CA secret already used by another Ingress, enforcing it on their own routes and learning whether it exists, without disclosure of its contents.

Weakness: CWE-863 (Incorrect Authorization)

## Which versions are affected by CVE-2026-119573?

It affects 1 product.


Products: Traefik.

## How do I fix CVE-2026-119573?

No fix has been published for CVE-2026-119573 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-119573 being exploited?

There is no known exploitation of CVE-2026-119573 in the wild and no public exploit code.

## Other vulnerabilities in Traefik

- [CVE-2024-45410](https://insights.sbomify.com/CVE-2024-45410/): HTTP client can remove the X-Forwarded headers in Traefik (critical 9.8)
- [CVE-2026-88877](https://insights.sbomify.com/CVE-2026-88877/): Traefik v3.7.0 Authentication Bypass via from-to-www-redirect (critical 9.3)
- [CVE-2026-85595](https://insights.sbomify.com/CVE-2026-85595/): Traefik before v2.11.55 and v3.0.0 through v3.7.10 Authentication Bypass via digestAuth (critical 9.3)
- [CVE-2026-88007](https://insights.sbomify.com/CVE-2026-88007/): Traefik HTTP/3 Backend NTLM Connection Reuse (critical 9.1)
- [CVE-2026-88009](https://insights.sbomify.com/CVE-2026-88009/): Traefik: Rootless HTTP/1 request-target routes as "/" but is forwarded verbatim, bypassing path-scoped routing, middleware guards and access logging (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-119573 and fix it if it is affected.

What it is: CVE-2026-119573 is a low-severity vulnerability in Traefik, published on 30 Oct 2026. 
Exploitation: There is no known exploitation of CVE-2026-119573 in the wild and no public exploit code.

Affected product: 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-2026-119573/ (Markdown: https://insights.sbomify.com/CVE-2026-119573/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-119573
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-119573
- OSV: https://osv.dev/vulnerability/CVE-2026-119573

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-119573/
Summaries are generated and may contain mistakes; the official description above is the record.