CVE-2026-40040

HIGH 8.8

Pachno 1.0.6 Unrestricted File Upload Remote Code Execution

CVSS Score

8.8

EPSS Score

0.1%

EPSS Percentile

27th

Pachno 1.0.6 contains an unrestricted file upload vulnerability that allows authenticated users to upload arbitrary file types by bypassing ineffective extension filtering to the /uploadfile endpoint. Attackers can upload executable files .php5 scripts to web-accessible directories and execute them to achieve remote code execution on the server.

CWE	CWE-434
Vendor	pancho
Product	pachno
Published	Apr 13, 2026
Last Updated	Apr 14, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Affected Versions

pancho / Pachno

1.0.6

References

NVD ↗ CVE.org ↗ EPSS Data ↗

zeroscience.mk: https://www.zeroscience.mk/en/vulnerabilities/ZSL-2026-5982.php vulncheck.com: https://www.vulncheck.com/advisories/pachno-unrestricted-file-upload-remote-code-execution

Credits

LiquidWorm as Gjoko Krstic of Zero Science Lab