CVE-2026-6903: Path Traversal Vulnerability in LabOne User Interface

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-04-23 · updated 2026-10-26
Weakness: CWE-22

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.

Affected products

Zurich Instruments LabOne: before 26.01.3.9 — fixed in 26.01.3.9

How to fix

Upgrade to a fixed version: Zurich Instruments LabOne 26.01.3.9. Check the vendor advisory for mitigations.

References

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