CVE-2026-39918

CRITICAL 9.8

Vvveb < 1.0.8.1 Code Injection via Installation Endpoint

CVSS Score

9.8

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-94
Vendor	givanz
Product	vvveb
Published	Apr 20, 2026
Last Updated	Apr 20, 2026

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CVSS v3 Breakdown

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Affected Versions

givanz / Vvveb

0 < 1.0.8.1

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/givanz/Vvveb/releases/tag/1.0.8.1 github.com: https://github.com/givanz/Vvveb/commit/5162c1639130bd080ab63c7d856788cd59d6b3b7 vulncheck.com: https://www.vulncheck.com/advisories/vvveb-code-injection-via-installation-endpoint

Credits

Mohammed EL OUARDANI (sh4dowalker) VulnCheck