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CVE-2026-78839: n/a

0
High
VulnerabilityCVE-2026-78839cvecve-2026-78839
Published: 09/04/2026 (09/04/2026, 00:00:00 UTC)
Source: CVE Database V5

Description

An arbitrary file upload vulnerability in AppNitro MachForm v30 allows attackers to execute arbitrary code via uploading a crafted .phar file.

CVSS v3.1

Score 8.1high

Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

AI-Powered Analysis

Machine-generated threat intelligence

AILast updated: 09/15/2026, 00:27:59 UTC

Technical Analysis

CVE-2026-78839 is an arbitrary file upload vulnerability in AppNitro MachForm version 30. The flaw allows unauthenticated attackers to upload a specially crafted .phar file, which can lead to execution of arbitrary code on the affected system. The vulnerability has a CVSS 3.1 base score of 8.1, indicating high impact on confidentiality, integrity, and availability. No vendor advisory or patch information is currently available, and no known exploits in the wild have been reported.

Potential Impact

Successful exploitation of this vulnerability can result in full system compromise due to arbitrary code execution. This affects confidentiality, integrity, and availability of the affected system. Since the vulnerability allows remote code execution without privileges or user interaction, it poses a significant risk to affected deployments.

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 functionality, implement strict file type validation, and monitor for suspicious upload activity as temporary mitigations.

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Technical Details

Data Version
5.2
Assigner Short Name
mitre
Date Reserved
2026-08-25T00:00:00.000Z
State
PUBLISHED

Threat ID: 6a9b1703acd9273b491742e5

Added to database: 09/04/2026, 19:07:47 UTC

Last enriched: 09/15/2026, 00:27:59 UTC

Last updated: 10/18/2026, 18:48:24 UTC

Views: 81

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