An arbitrary file upload vulnerability in AppNitro MachForm v30 allows attackers to execute arbitrary code via uploading a crafted .phar file. (CVE-2026-78839)
Description
AppNitro MachForm version 30 contains an arbitrary file upload vulnerability that allows attackers to execute arbitrary code by uploading a specially crafted .phar file. This vulnerability enables remote code execution through malicious file uploads.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability in AppNitro MachForm v30 involves improper handling of file uploads, specifically allowing an attacker to upload a crafted .phar file. This arbitrary file upload flaw can lead to execution of arbitrary code on the affected system, potentially compromising the application and underlying server.
Potential Impact
Successful exploitation of this vulnerability allows an attacker to execute arbitrary code on the server running AppNitro MachForm v30. This could lead to full system compromise, data theft, or further attacks within the affected environment.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict file upload capabilities and monitor for suspicious uploads involving .phar files.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-5w46-w28q-f95g
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-78839"]
- State
- PUBLISHED
Threat ID: 6a9c2639acd9273b49fc991d
Added to database: 09/05/2026, 14:24:57 UTC
Last enriched: 09/07/2026, 14:38:40 UTC
Last updated: 10/18/2026, 18:48:24 UTC
Views: 43
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