Vulnerability · Published Aug 25, 2026 · Assigned by VulnCheck
CVE-2026-56703Adminer before 5.4.3 Remote Code Execution via SQLite VACUUM INTO
High 7.2
In plain English
A high-severity code injection in adminer from vrana. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 1.2% (higher than 68% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)7.2High
Exploit odds (30 days)1.2%top 32.4% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
Adminer before 5.4.3 contains a remote code execution vulnerability in SQLite query handling where VACUUM INTO is not blocked despite ATTACH restrictions. Authenticated attackers can execute VACUUM INTO to write PHP code to arbitrary file paths and execute commands on the server.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | adminer | no fix listed | DEBIAN-CVE-2026-56703 |
| Debian:13 | adminer | no fix listed | DEBIAN-CVE-2026-56703 |
| Debian:14 | adminer | 5.4.3+dfsg-1 | DEBIAN-CVE-2026-56703 |
| Ubuntu:22.04:LTS | adminer | no fix listed | UBUNTU-CVE-2026-56703 |
| Ubuntu:24.04:LTS | adminer | no fix listed | UBUNTU-CVE-2026-56703 |
| Ubuntu:26.04:LTS | adminer | no fix listed | UBUNTU-CVE-2026-56703 |
Affected products (as reported)
Weakness: CWE-94 · Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
References
- GitHub Security Advisory (GHSA-gmx3-g29w-77wf) vendor-advisory
- VulnCheck Advisory: Adminer before 5.4.3 Remote Code Execution via SQLite VACUUM INTO third-party-advisory