CVE-2026-34027 Upload restriction bypass in Wertheim SafeController Software allows authenticated users to upload arbitrary files
Authenticated attackers can bypass file type validation by spoofing Content-Type headers to upload arbitrary files, potentially leading to code execution.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-34027?
CVE-2026-34027 is a medium-severity vulnerability in Wertheim SafeController Software for VAULT ROOMS (Safe Deposit Locker System), published on 15 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
The Wertheim SafeController Software, AssemblyVersion 6.15.8328.28014, contains insufficient server-side file type validation in the /safe/contract/uploadcustomdocuments endpoint. The application validates uploaded files based on the user-controlled HTTP Content-Type value and accepts the upload if this value contains an allowed string such as pdf, jpeg, tiff, or png. An authenticated attacker with any role or permission level can spoof the Content-Type value and upload arbitrary file content.
Weakness: CWE-434
Which versions are affected by CVE-2026-34027?
How do I fix CVE-2026-34027?
No fix has been published for CVE-2026-34027 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-34027 being exploited?
There is no known exploitation of CVE-2026-34027 in the wild and no public exploit code.
Sources
Also known as GHSA-gr5m-9xq3-vhc7.