CVE-2026-78839 — HIGH (8.1)

Vulnerability Description

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

CVSS Score

8.1

HIGH

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

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

HIGH

Integrity

HIGH

Availability

HIGH

Related Weaknesses (CWE)

CWE-434

References

https://github.com/nabeelmkhan/CVE-2026-78839
https://packetstormsecurity.com

FAQ

What is CVE-2026-78839?

CVE-2026-78839 is a vulnerability with a CVSS score of 8.1 (HIGH). An arbitrary file upload vulnerability in AppNitro MachForm v30 allows attackers to execute arbitrary code via uploading a crafted .phar file.

How severe is CVE-2026-78839?

CVE-2026-78839 has been rated HIGH with a CVSS base score of 8.1/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-78839?

Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.