CVE-2026-6903 | THREATINT

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.

PUBLISHED Reserved 2026-04-23 | Published 2026-04-23 | Updated 2026-04-23 | Assigner NCSC.ch

HIGH: 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

HIGH: 8.7CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

Problem types

CWE-22 Improper Limitation of a Pathname to a Restricted Directory (‘Path Traversal’)

CWE-346 Origin Validation Error

Product status

Default status
unaffected

Any version before 26.01.3.9
affected

References

www.zhinst.com/support/security/2026/zi-sa-2026-001/ vendor-advisory

www.zhinst.com/support/download-center/ patch

cve.org (CVE-2026-6903)

nvd.nist.gov (CVE-2026-6903)

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