PHP
CVE-2026-22034
CRITICAL
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Primary rating from GitHub Advisory · only source for this CVE.
CVSS VectorGitHub Advisory
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Lifecycle Timeline
4DescriptionGitHub Advisory
Snuffleupagus is a module that raises the cost of attacks against website by killing bug classes and providing a virtual patching system. On deployments of Snuffleupagus prior to version 0.13.0 with the non-default upload validation feature enabled and configured to use one of the upstream validation scripts based on Vulcan Logic Disassembler (VLD) while the VLD extension is not available to the CLI SAPI, all files from multipart POST requests are evaluated as PHP code. The issue was fixed in version 0.13.0.
AnalysisAI
Snuffleupagus PHP security module before 0.13.0 can be bypassed when upload validation uses VLD-based scripts without the VLD extension installed. This disables the upload security check entirely, allowing malicious PHP file uploads. PoC available, patch available.
Technical ContextAI
When upload validation is configured to use Vulcan Logic Disassembler (VLD) scripts but VLD is not installed, the validation silently fails open (CWE-636), approving all uploads regardless of content. This is a fail-open vulnerability in a security tool.
RemediationAI
Update to Snuffleupagus 0.13.0. Verify that all required extensions for validation scripts are installed.
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Same weakness CWE-636 – Not Failing Securely ('Failing Open')
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External POC / Exploit Code
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