# CVE-2026-89309: Missing Authentication Vulnerability in JTL-WMS

> Remote attackers can bypass authentication in JTL-WMS MobileServer by using non-GET methods or malformed headers, accessing API functionality without credentials.

- **Severity:** Critical 10.0 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 13 Oct 2026
- **Updated:** 16 Oct 2026
- **Also known as:** GHSA-7chg-cp4g-f4v9

## What is CVE-2026-89309?

CVE-2026-89309 is a critical authentication bypass vulnerability in JTL-WMS, published on 13 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The authorization middleware of the WMS MobileServer
fails to require authentication in two distinct cases. First, it
only requires an Authorization header for GET and HEAD requests; requests
using any other HTTP method are processed without an authentication check.
Second, for any HTTP method including GET and HEAD, a request carrying a
malformed or non-bearer Authorization header is passed through without
a valid token being required.

The middleware does validate a token whenever a
well-formed one is present, but in these two cases it does not
require one. A remote attacker with network access to the service can
therefore invoke API functionality without valid credentials.

Weakness: CWE-306 (Missing Authentication for Critical Functionality)

## Which versions are affected by CVE-2026-89309?


## How do I fix CVE-2026-89309?

No fix has been published for CVE-2026-89309 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-89309 being exploited?

There is no known exploitation of CVE-2026-89309 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-89309 and fix it if it is affected.

What it is: CVE-2026-89309 is a critical authentication bypass vulnerability in JTL-WMS, published on 13 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-89309 in the wild and no public exploit code.

Affected product: JTL-WMS. 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-2026-89309/ (Markdown: https://insights.sbomify.com/CVE-2026-89309/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-89309
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-89309
- OSV: https://osv.dev/vulnerability/CVE-2026-89309

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-89309/
Summaries are generated and may contain mistakes; the official description above is the record.