# CVE-2026-126380: Vvveb before 1.0.9.0 RCE via .phar Extension Denylist Bypass in Media Upload

Status: published. Published: 2026-11-13. Updated: 2026-11-13.

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.

## Remediation

- fix: The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches. (source: CNA: VulnCheck) — https://github.com/givanz/Vvveb/commit/638a6c6f5a7a7f7ff4c65f996894f400d8fb8e77

## Affected products and versions

- givanz / Vvveb (vvveb/vvveb): ≥ 0; < 1.0.9.0 (affected, custom); 1.0.9.0 (unaffected, custom). Source: CNA: VulnCheck

## Severity and prioritization

- CVSS 4.0: 9.4 (critical); CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H; source: CNA: VulnCheck

- CVSS 3.1: 9.1 (critical); CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H; source: CNA: VulnCheck

- CVSS 4.0: 9.4 (critical); CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/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:X/V:X/RE:X/U:X; source: NVD: disclosure@vulncheck.com

- CVSS 3.1: 9.1 (critical); CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H; source: NVD: disclosure@vulncheck.com

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: Not available

- Weaknesses: CWE-434

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://github.com/givanz/Vvveb/security/advisories/GHSA-hcpj-pcpx-2744 (CNA: VulnCheck; vendor-advisory)

- https://github.com/givanz/Vvveb/commit/638a6c6f5a7a7f7ff4c65f996894f400d8fb8e77 (CNA: VulnCheck; patch)

- https://www.vulncheck.com/advisories/vvveb-before-1.0.9.0-rce-via-phar-extension-denylist-bypass-in-media-upload (CNA: VulnCheck; third-party-advisory)

- https://github.com/givanz/Vvveb/commit/638a6c6f5a7a7f7ff4c65f996894f400d8fb8e77 (disclosure@vulncheck.com)

- https://github.com/givanz/Vvveb/security/advisories/GHSA-hcpj-pcpx-2744 (disclosure@vulncheck.com)

- https://www.vulncheck.com/advisories/vvveb-before-1.0.9.0-rce-via-phar-extension-denylist-bypass-in-media-upload (disclosure@vulncheck.com)

## Provenance

- CNA: VulnCheck: https://www.cve.org/CVERecord?id=CVE-2026-126380; retrieved 2026-11-13; source updated 2026-11-13

- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-126380; retrieved 2026-11-13; source updated 2026-11-13

Revision: 0436581a5866ae1b778caf8847393f1454fa5a0af2a35bf94d5f100ec60a0f85

Canonical: https://y2.dev/cve/CVE-2026-126380

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