Is CVE-2026-39918 actively exploited?

No active exploitation of CVE-2026-39918 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-39918 be exploited remotely?

Yes. CVE-2026-39918 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-39918?

CVE-2026-39918 has a CVSS score of 9.8 (CRITICAL).

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CRITICAL

CVE-2026-39918

CWE-94Published: April 20, 2026· Updated: Apr 20, 2026

9.8

CVSS v3.1

EPSS:0.22%probability of exploitation in 30 daysPercentile:44.4th

Official Description

Vvveb prior to 1.0.8.1 contains a code injection vulnerability in the installation endpoint where the subdir POST parameter is written unsanitized into the env.php configuration file without escaping or validation. Attackers can inject arbitrary PHP code by breaking out of the string context in the define statement to achieve unauthenticated remote code execution as the web server user.

NVD Source

Technical Analysis

CVE-2026-39918 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.