What is CVE-2026-6903?

CVE-2026-6903 is a high-severity vulnerability in Zurich Instruments Labone, classified under Path Traversal. CVSS score: 7.5/10. Published 2026-04-23.

How severe is CVE-2026-6903?

High severity. CVSS v3 base score is 7.5 out of 10.

Path Traversal in Zurich Instruments Labone

CVE-2026-6903

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…

Vulnerability class: Path Traversal (Directory Traversal)

EPSS: 0.000 (10.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

Affected products

Zurich Instruments Labone — versions 0

Weakness classification (CWE)

CWE-22 — Path Traversal
CWE-346 — Origin Validation Error

References

vulnerability@ncsc.ch (vendor-advisory)
vulnerability@ncsc.ch (patch)

Frequently asked questions

What is CVE-2026-6903?: CVE-2026-6903 is a high-severity vulnerability in Zurich Instruments Labone, classified under Path Traversal. CVSS score: 7.5/10. Published 2026-04-23.
How severe is CVE-2026-6903?: High severity. CVSS v3 base score is 7.5 out of 10.