What is CVE-2026-56702?

CVE-2026-56702 is a high-severity vulnerability in Vrana Adminer, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 8.8/10. Published 2026-08-25.

How severe is CVE-2026-56702?

High severity. CVSS v3 base score is 8.8 out of 10.

Arbitrary file upload in Vrana Adminer

CVE-2026-56702

Adminer versions before 5.4.3 contain an unrestricted file upload vulnerability in the AdminerFileUpload plugin that allows authenticated users to upload PHP files by exploiting a permissive default extension allowlist. Attackers can upload PHP webshells to columns ending in _path and execute arbitrary code as the web-server user when uploadPath is web-served.

Vulnerability class: Unrestricted File Upload

Published 2026-08-25 · last modified 2026-09-08.

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: 0.006 (48.0th percentile), scored 2026-10-10.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 48th percentile — 48.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.006 · change: +0.003

Affected products

Vrana Adminer

Weakness classification (CWE)

CWE-434 — Unrestricted Upload of File with Dangerous Type

References

github.com/vrana/adminer/security/advisories/GHSA-vcvj-rwwm-x6g5 (vendor-advisory)
www.vulncheck.com/advisories/adminer-before-unrestricted-file-upload-via-admine… (third-party-advisory)

Frequently asked questions

What is CVE-2026-56702?: CVE-2026-56702 is a high-severity vulnerability in Vrana Adminer, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 8.8/10. Published 2026-08-25.
How severe is CVE-2026-56702?: High severity. CVSS v3 base score is 8.8 out of 10.