What’s Vulnerable › Vulnerabilities

CVE-2026-22034: Snuffleupagus vulnerable to RCE on instances with upload validation enabled but without the VLD package

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-01-08 · updated 2026-06-17
• Weakness: CWE-636

Description

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.

Affected products

• jvoisin snuffleupagus: before 0.13.0 — fixed in 0.13.0

How to fix

Upgrade to a fixed version: jvoisin snuffleupagus 0.13.0. Check the vendor advisory for mitigations.

References

• https://github.com/jvoisin/snuffleupagus/blob/9278dc77bab2a219e770a1b31dd6797bc9070e37/src/sp_upload_validation.c#L92-L100
• https://github.com/jvoisin/snuffleupagus/blob/v0.12.0/scripts/upload_validation.php
• https://github.com/jvoisin/snuffleupagus/blob/v0.12.0/scripts/upload_validation.py
• https://github.com/jvoisin/snuffleupagus/commit/9278dc77bab2a219e770a1b31dd6797bc9070e37
• https://github.com/jvoisin/snuffleupagus/security/advisories/GHSA-c4ch-xw5p-2mvc
• https://github.com/php/php-src/blob/e4098da58a9eaee759d728d98a27d809cde37671/ext/standard/dl.c#L165-L166
• https://github.com/php/php-src/blob/e4098da58a9eaee759d728d98a27d809cde37671/main/rfc1867.c#L1269-L1274
• https://snuffleupagus.readthedocs.io/config.html#upload-validation

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