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.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
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
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.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-89309 being exploited?
There is no known exploitation of CVE-2026-89309 in the wild and no public exploit code.
Sources
Also known as GHSA-7chg-cp4g-f4v9.