CVE-2026-39918: critical vulnerability in givanz Vvveb
Vvveb < 1.0.8.1 Code Injection via Installation Endpoint
Published · Updated
28Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 9.2epss 1.1%
exploitation probability
1.1%top 34% of all CVEs
observed exploitation
nono source reports it
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
Affected products
givanz · VvvebRelated CVEs — givanz Vvveb
In the same product, most dangerous first.
CVE-2025-8517MEDIUMgivanz Vvveb session fixiationEPSS 2.2%CVE-2025-8518MEDIUMgivanz Vvveb Code Editor code.php save code injectionEPSS 2.1%CVE-2026-41938HIGHVvveb < 1.0.8.2 RCE via Media Upload HandlerEPSS 1.0%CVE-2026-34427HIGHVvveb < 1.0.8.1 Privilege Escalation via admin/user/saveEPSS 1.0%CVE-2026-41934HIGHVvveb < 1.0.8.2 Authenticated RCE via Code EditorEPSS 1.0%CVE-2026-54612HIGHVvveb: Authenticated editor path traversal to PHP file write/RCE via data-v-save-globalEPSS 0.8%