Authenticated arbitrary file upload via Content-Type spoofing
Published Jun 15, 2026 · Updated Jun 15, 2026
Unrestricted file upload in Wertheim SafeController Software 6.15.8328.28014 allows remote authenticated users to write arbitrary files. UploadCustomDocuments accepts a file when its user-controlled Content-Type string merely contains pdf, jpeg, tiff, or png, without validating the file content. Any valid session and any role can reach the endpoint; the file is written before its later permission check, although retrieval can depend on permission or another flaw.
Summary
What happened
Unrestricted file upload in Wertheim SafeController Software 6.15.8328.28014 allows remote authenticated users to write arbitrary files. UploadCustomDocuments accepts a file when its user-controlled Content-Type string merely contains pdf, jpeg, tiff, or png, without validating the file content. Any valid session and any role can reach the endpoint; the file is written before its later permission check, although retrieval can depend on permission or another flaw.
The record
- CVE
- CVE-2026-34027
- Published
- Jun 15, 2026
- Updated
- Jun 15, 2026
- Vendor
- Wertheim Vertriebsgesellschaft m.b.H.
- Product
- Wertheim SafeController Software
- Classifications
- CWE-434, T1105
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Jun 15, 2026CVE publishedPublication date reported by the CVE source.
- Jun 15, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
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- Affected versionversion=Wertheim SafeController Software, AssemblyVersion 6.15.8328.28014
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- SEC Consult authenticated upload-bypass proof of conceptproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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