CVE-2026-39918

Critical

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.

SeverityCritical

CVSS9.8

Exploit probability—

ProductVvveb

PublishedApr 20, 2026

First seenApr 20, 2026

Weakness typeCWE-94Code injection

How to fix

Update

givanz Vvveb1.0.8.1 or later

Patches

github.com/givanz/Vvveb/commit/5162c1639130bd080ab63c7d856788cd59d6b3b7

Vendor advisories

github.com/givanz/Vvveb/releases/tag/1.0.8.1

Affected products

Product	Affected versions	Fixed in
givanz Vvveb	v < 1.0.8.1	1.0.8.1

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