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  4. CVE 2026 126378 vvveb through 1086 webshell upload via theme
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Back to active CVEs
Critical · CVSS 9.4CVE-2026-126378

Vvveb through 1.0.8.6 Webshell Upload via Theme Installer validFile() BypassCVE-2026-126378

Answer in brief

CVE-2026-126378 records a Critical severity (CVSS 9.4) vulnerability in Vvveb through 1.0.8.6 Webshell Upload via Theme Installer validFile() Bypass. The current sources do not mark it as known exploited. The current feed maps givanz/Vvveb (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Nov 13, 2026Updated Nov 13, 2026Source checked Nov 13, 2026First seen by HOL Nov 13, 2026Material review Nov 13, 2026
Upstream Advisory

Key facts

Risk
Critical · CVSS 9.4
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Not reported

Why this deserves its current priority

CVSS is 9.4. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps givanz/Vvveb (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
givanz/Vvvebgeneric>=0 <=1.0.8.6Not reported

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for givanz/Vvveb.
  2. 2Review the reported fix. Monitor this advisory for an available fix and review any installs of the affected package.

Evidence timeline and material changes

  1. Published upstream

    Nov 13, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Nov 13, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Nov 13, 2026

Sources and claim methodology

  • GitHub security advisorygithub.com
  • Source referencevulncheck.com
Upstream source description

Vvveb through 1.0.8.6 contains a file upload vulnerability in the theme installer validFile() function that uses strpos() instead of strict path matching. Attackers with admin credentials can upload a ZIP containing a PHP file whose path includes /theme.php to achieve remote code execution on nginx deployments.

Quoted source text, attributed separately from HOL analysis.

Record context

Vulnerability class
Arbitrary File Read
EPSS
Not reported
CWE IDs
CWE-434
Source
CVE List V5
Source checked
Nov 13, 2026
References
2 linked sources
Open source record