CVE-2026-78839
HIGHCVSS 8.1/10EPSS 0.26%
Last modified
CVE-2026-78839 is a high-severity vulnerability rated 8.1/10 on the CVSS scale. An arbitrary file upload vulnerability in AppNitro MachForm v30 allows attackers to execute arbitrary code via uploading a crafted .phar file.. EPSS estimates a 0.26% chance of exploitation in the next 30 days.
Description
An arbitrary file upload vulnerability in AppNitro MachForm v30 allows attackers to execute arbitrary code via uploading a crafted .phar file.
Metrics
Weakness Enumeration
Affected Software
Source: CNA advisory (CVE.org). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| — | — | n/a |
References
Timeline
- Published
- Last Modified
- Status
- Deferred
Frequently Asked Questions
What is CVE-2026-78839?
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 a CVSS score of 8.1/10 (HIGH severity). The EPSS model estimates a 0.26% probability of exploitation in the next 30 days.
How do I fix CVE-2026-78839?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2026
- CVE-2026-78807An issue in wpa_supplicant all versions before v.2.12 allows…7.1
- CVE-2026-7881Concrete CMS 9.5.0 and below is subject to Insecure Direct O…4.3
- CVE-2026-7882Concrete CMS 9.5.0 and below is vulnerable to unauthorized …4.3
- CVE-2026-78834A code execution vulnerability exists in CMSimple 5.22 in th…8.8
- CVE-2026-78837A SQL injection vulnerability in the ap_form_{id} parameter …7.5
- CVE-2026-78838A reflected cross-site scripting (XSS) vulnerability in the …6.5
- CVE-2026-7884IBM Cognos Analytics 12.1.0 through 12.1.3 FP1, and 12.0.4 t…5.4
- CVE-2026-78847An issue in gray-matter All versions (verified on 4.0.3) all…9.8
- CVE-2026-78849Cross Site Scripting vulnerability in Netgate pfSense Plus s…5.4
- CVE-2026-7886Concrete CMS 9.5.0 and below is vulnerable to IDOR in AddMes…4.3
- CVE-2026-78863A vulnerability was found in liketrek TREK up to 3.0.22. Imp…6.3
- CVE-2026-78864A vulnerability was determined in liketrek TREK up to 3.0.22…6.3
Are you affected by CVE-2026-78839?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST