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Vulnerability record · CVE-2026-39918 · published 20 April 2026

CVE-2026-39918: Code injection vulnerability

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.

9.2 CVSS 4.0 Critical EPSS 1.1% · top 34.8% CWE-94 · Code injection Deferred
9.2CVSS 4.0 base score
1.1%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
3References
14 Jul 2026Last modified by NVD

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.

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/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:

References

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

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Source: NIST National Vulnerability Database (record CVE-2026-39918), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.