by Kastro
Paper/Archive/CVE-2026-126380

CVE-2026-126380

givanz Vvveb — Vvveb before 1.0.9.0 RCE via .phar Extension Denylist Bypass in Media Upload

CVSS 9.4
critical.is priorityof 100
28
CVSS 9.4 (CNA)9.4 / 10 × 3028.2Not in CISA KEV+300.0No EPSS score.000 × 200.0No public exploit+100.0SSVC exploitation: unknown+100.0
Description · from the CVE record

Vvveb before 1.0.9.0 contains a denylist bypass in system/traits/media.php where '.phar' is misconfigured with a leading dot, allowing authenticated administrators to upload .phar PHP files. Attackers can upload a GIF magic-byte polyglot webshell bypassing binary inspection and execute arbitrary OS commands as the web-server user.

Affected

ProductAffectedFixed inSource
Vvveb< 1.0.9.01.0.9.0CNA

Scores by source

VulnCheck (CNA)9.4CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
VulnCheck (CNA)9.1CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

References

advisorygithub.com/givanz/Vvveb/security/advisories/GHSA-hcpj-pcpx-2744patchgithub.com/givanz/Vvveb/commit/638a6c6f5a7a7f7ff4c65f996894f400d8fb8e77writeupvulncheck.com/advisories/vvveb-before-1.0.9.0-rce-via-phar-extension-denylist-bypass-in-media-upload