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
- Tunnelblick — versions 9.0, 3.3, 8.1
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Exploit, Vendor Advisory)
- security-advisories@github.com (Product, x_refsource_MISC, Release Notes)
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.