Is CVE-2026-31893 in the CISA KEV catalog?

No. CVE-2026-31893 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2026-31893?

CVE-2026-31893 has a CVSS v3 base score of 5.5 (MEDIUM).

What is the EPSS score for CVE-2026-31893?

CVE-2026-31893 has an EPSS score of 0.24% (15th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2026-31893?

Upgrade tunnelblick to 8.0.1 or later.

CVE & CISA-KEV Catalog

CVE-2026-31893

MEDIUM

5.5

CVSS v3

NVD

Description

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, reachable through the world-accessible tunnelblickd Unix socket. The socket is configured with mode 0666, allowing any local user to connect. No authorization check is performed on the connecting client. The tunnelblick-helper process constructs a path to config.ovpn inside a user-controlled .tblk directory and reads it as root without symlink validation. An attacker can create a .tblk configuration with a symlinked config.ovpn pointing to any file and request tunnelblickd to read it. This issue has been fixed in versions 9.0beta02.

CWE-61

How to fix

Remediation Available

tunnelblickNVD

Affected:>= 3.5.3, < 8.0.1Fixed in:8.0.1CVE-2026-31893derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorLocal

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityNone

AvailabilityNone

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Exploit Intelligence

0.24%probability of exploitation in 30 days

15thpercentile

Low risk: more likely to be exploited than 15% of all known CVEs.

References

Exploit1

github.com

Release Notes1

github.com

Embed a live status badge for CVE-2026-31893

Markdown

[![CVE-2026-31893](https://tridentstack.com/cve/badge/CVE-2026-31893.svg)](https://tridentstack.com/cve/CVE-2026-31893)

HTML

<a href="https://tridentstack.com/cve/CVE-2026-31893"><img src="https://tridentstack.com/cve/badge/CVE-2026-31893.svg" alt="CVE-2026-31893"></a>

Find and fix vulnerabilities across your fleet

TridentStack Control continuously scans your Windows, macOS, and Linux fleet for known vulnerabilities, prioritizes them by severity and active exploitation, and patches them automatically.

Start free

This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-06-01.