CVE-2026-40040Network attack vector

Authenticated code execution via .php5 upload

Published Apr 13, 2026 · Updated Apr 13, 2026

Unrestricted file upload in Pachno 1.0.6 allows remote authenticated users to execute server-side code through the /uploadfile endpoint. The endpoint applies an ineffective extension filter that accepts executable .php5 files and stores them in web-accessible directories. A valid account is required; after uploading a script, the attacker can request it to execute code with the web server's privileges.

CVSS severity8.7
High
EPSS probability0.47%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Unrestricted file upload in Pachno 1.0.6 allows remote authenticated users to execute server-side code through the /uploadfile endpoint. The endpoint applies an ineffective extension filter that accepts executable .php5 files and stores them in web-accessible directories. A valid account is required; after uploading a script, the attacker can request it to execute code with the web server's privileges.

The record

CVE
CVE-2026-40040
Published
Apr 13, 2026
Updated
Apr 13, 2026
Vendor
Pachno
Product
Pachno
Classifications
CWE-434, T1505.003
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 13, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 13, 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=1.0.6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Pachno · Pachnoversion=1.0.6

Published CVSS scores

8.8VulnCheckCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
8.7VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-434Unrestricted Upload of File with Dangerous Type
T1505.003Web Shell

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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