CVE-2026-22034Public exploitNetwork attack vector

Remote code execution via failing-open VLD validation

Published Jan 8, 2026 · Updated Jan 8, 2026

Remote code execution in Snuffleupagus before 0.13.0 allows remote attackers to execute uploaded PHP through multipart POST requests. The upstream VLD validation scripts invoke the PHP CLI with the uploaded filename; when VLD fails to load, PHP ignores its nonexecution options and runs that file. Exploitation requires non-default upload validation, a VLD-based upstream script, no VLD extension in the CLI SAPI, and a reachable existing PHP script; successful requests run attacker-supplied PHP in the web service context.

CVSS severity9.2
Critical
EPSS probability0.72%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Remote code execution in Snuffleupagus before 0.13.0 allows remote attackers to execute uploaded PHP through multipart POST requests. The upstream VLD validation scripts invoke the PHP CLI with the uploaded filename; when VLD fails to load, PHP ignores its nonexecution options and runs that file. Exploitation requires non-default upload validation, a VLD-based upstream script, no VLD extension in the CLI SAPI, and a reachable existing PHP script; successful requests run attacker-supplied PHP in the web service context.

The record

CVE
CVE-2026-22034
Published
Jan 8, 2026
Updated
Jan 8, 2026
Vendor
Julien Voisin
Product
Snuffleupagus
Classifications
CWE-636, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 8, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 8, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 0.13.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Julien Voisin · Snuffleupagusversion=< 0.13.0

Published CVSS scores

9.2GitHubCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
9.8NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-636Not Failing Securely ('Failing Open')
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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