Arbitrary file upload in Pachno
CVE-2026-40040
Pachno 1.0.6 contains an unrestricted file upload vulnerability that allows authenticated users to upload arbitrary file types by bypassing ineffective extension filtering to the /uploadfile endpoint. Attackers can upload executable files .php5 scripts to web-accessible directories and execute them to achieve remote code execution on the server.
Vulnerability class: Unrestricted File Upload
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.008 (57.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 57th percentile — 57.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.008 · change: +0.004
Affected products
- Pachno — versions 1.0.6
- Pancho Pachno — versions 1.0.6
Weakness classification (CWE)
References
- www.zeroscience.mk/en/vulnerabilities/ZSL-2026-5982.php (third-party-advisory)
- www.vulncheck.com/advisories/pachno-unrestricted-file-upload-remote-code-execut… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-40040?
- CVE-2026-40040 is a high-severity vulnerability in Pachno, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 8.8/10. Published 2026-04-13.
- How severe is CVE-2026-40040?
- High severity. CVSS v3 base score is 8.8 out of 10.