---
id: "CVE-2026-126380"
page: "https://infrastack.ai/live/CVE-2026-126380"
kind: "vulnerability"
aliases: ["CVE-2026-126380"]
title: "Vvveb CMS: denylist bypass lets admins upload PHP webshells and run commands"
severity: "critical"
cvss: 9.4
epss: null
exploited: false
status: "open"
category: "other"
products: [{"name": "vvveb", "fixed": [], "affected": "", "ecosystem": "vendor"}]
ecosystems: ["vendor"]
tags: ["cms", "other", "php", "self-hosted", "vvveb"]
not_affected_if: ["managed-hosting", "version-1.0.9.0-or-later"]
published_at: "2026-11-13T10:17:40+00:00"
first_seen_at: "2026-11-13T10:47:17+00:00"
updated_at: "2026-11-13T10:48:18+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-126380", "first_seen_at": "2026-11-13T10:47:17+00:00"}]
exploit_sources: []
---

# Vvveb CMS: denylist bypass lets admins upload PHP webshells and run commands

Link for people: https://infrastack.ai/live/CVE-2026-126380 (this .md is for agents)

Vvveb before 1.0.9.0 has a misconfigured denylist in its media upload code, so '.phar' PHP files are accepted. An attacker who holds an administrator account can upload a disguised .phar webshell and run operating system commands as the web server user.

_Summary, check and fix written by a model from the sources; labelled as such._

## Affected

- vendor:vvveb affected range not listed fixed no fixed version listed

## How to check

- Check the Vvveb version in the installation and confirm whether it is below `1.0.9.0`
- Look at `system/traits/media.php` for the '.phar' entry in the upload denylist, which the sources say has a leading dot

## Fix

- Vvveb: upgrade to `1.0.9.0` or later

## Timeline

- 2026-11-13T10:47:17+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-126380

## Documents

- [advisory] Vendor advisory: github.com https://github.com/givanz/Vvveb/security/advisories/GHSA-hcpj-pcpx-2744
- [advisory] Third-party advisory: www.vulncheck.com https://www.vulncheck.com/advisories/vvveb-before-1.0.9.0-rce-via-phar-extension-denylist-bypass-in-media-upload
- [fix] Patch: github.com https://github.com/givanz/Vvveb/commit/638a6c6f5a7a7f7ff4c65f996894f400d8fb8e77

## From the sources

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.

---

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