PT-2026-37217 · Apple+2 · Apple Macos+2

Jkbullard · Published 2026-05-05 · Updated 2026-05-05 · CVE-2026-31893

Positive Technologies (AI Summary)

CVSS v4.0

6.8

Medium

Base vector

AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Name of the Vulnerable Software and Affected Versions Tunnelblick versions 3.3beta26 through 9.0beta01

Description Tunnelblick is an open source graphic user interface for OpenVPN on macOS. A symlink following issue exists in the tunnelblick-helper process, which is accessible via the world-accessible tunnelblickd Unix socket. Because the socket is configured with mode 0666 and lacks authorization checks, any local user can connect to it. The process constructs a path to config.ovpn within a user-controlled .tblk directory and reads it with root privileges without validating symlinks. A local attacker can create a .tblk configuration containing a symlinked config.ovpn pointing to any file on the system to read arbitrary root-owned files.

Recommendations Update to version 9.0beta02.

Exploit

Fix

Weakness Enumeration

CWE-61

Related Identifiers

CVE-2026-31893

Affected Products

Openvpn

Tunnelblick

Apple Macos

References · 4

• 🔥 https://github.com/Tunnelblick/Tunnelblick/security/advisories/GHSA-927j-vcjf-hq69 · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2026-31893 · Security Note
• https://github.com/Tunnelblick/Tunnelblick/releases/tag/v9.0beta02 · Note
• https://twitter.com/CVEnew/status/2051741651710668987 · Twitter Post