Vulnerability in Tunnelblick

CVE-2026-31893

Tunnelblick is an open source graphic user interface for OpenVPN on macOS. In versions 3.3beta26 through 9.0beta01, any local user can read arbitrary root-owned files by exploiting a symlink following vulnerability in tunnelblick-helper, r…

EPSS: 0.000 (0.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-31893?
CVE-2026-31893 is a medium-severity vulnerability in Tunnelblick, classified under UNIX Symbolic Link (Symlink) Following. CVSS score: 5.5/10. Published 2026-05-05.
How severe is CVE-2026-31893?
Medium severity. CVSS v3 base score is 5.5 out of 10.