Vulnerability record/PUBLISHED/Published Apr 20, 2026 14:46:33 UTC
CVE-2026-39918
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.
Base score9.2/ 10
SeverityCriticalCVSS 4.0
Exploitability / impact
CVSS metric breakdown
Base severityCritical
Attack vectorNetworkAV
Attack complexityLowAC
Attack requirementsPresentAT
Privileges requiredNonePR
User interactionNoneUI
Vulnerable system confidentialityHighVC
Vulnerable system integrityHighVI
Vulnerable system availabilityHighVA
Subsequent system confidentialityNoneSC
Subsequent system integrityNoneSI
Subsequent system availabilityNoneSA
CVSS vector string
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:NCVSS communicates standardized severity and impact characteristics. It does not establish whether a system is exploitable in your specific environment.
Record context
CVE Numbering AuthorityVulnCheck
Last updatedNov 8, 2026 14:02:33 UTC
PublishedApr 20, 2026 14:46:33 UTC
ReservedApr 7, 2026 20:57:06 UTC
Credits
- Mohammed EL OUARDANI (sh4dowalker)
- VulnCheck