CVE-2026-78839CWE-434unrestricted-file-upload

CVE-2026-78839

High · published September 4, 2026

CVSS v3.1
8.1
EPSS
1%
Percentile
45.5
In the wild
Unconfirmed
What it is

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

The record
Technical detail
CVSS v3.1
8.1 · HIGH
Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00553 · 45.5th percentile
Weakness
CWE-434 · Unrestricted Upload of File with Dangerous Type
Published
2026-09-04T23:17Z
References (2)
https://github.com/nabeelmkhan/CVE-2026-78839 · [email protected]https://packetstormsecurity.com · [email protected]
EPSS history
Timeline
  • 06 SEP 03:33Z
    EPSS moved — → 0%
    epss
  • 04 SEP 00:00Z
    An arbitrary file upload vulnerability in AppNitro MachForm v30 allows attackers to execute arbitrary code via uploading a crafted .phar file
    cvelistv5