CVE-2026-6903

Path Traversal Vulnerability in LabOne User Interface

State: Published
Severity: 8.7 High
Published: Apr 23, 2026
Updated: Apr 23, 2026
Reserved: Apr 23, 2026

Description

The LabOne Web Server, backing the LabOne User Interface, contains insufficient input validation in its file access functionality. An unauthenticated attacker could exploit this vulnerability to read arbitrary files on the host system that are accessible to the operating system user running the LabOne software.

Additionally, the Web Server does not sufficiently restrict cross-origin requests, which could allow a remote attacker to trigger file access from a victim's browser by directing the victim to a malicious website.

The vulnerability is only exploitable when the LabOne Web Server is running. Installations using only the LabOne APIs without starting the Web Server are not exposed.

Scores

CVSS	Score	Vector	Source
4.0	8.7 High	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N	NCSC.ch
3.1	7.5 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N	NCSC.ch

Weaknesses

CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
CWE-346 Origin Validation Error

Affected Products

Product	Versions
LabOneZurich Instruments	before 26.01.3.9Affected

References

https://www.zhinst.com/support/security/2026/zi-sa-2026-001/vendor-advisory
https://www.zhinst.com/support/download-center/patch

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