CVE-2026-109347: Adminer remote code execution via UTF-8 BOM bypass in SQLite

CVE-2026-109347 · Severity: high · CVSS 7.2 · Published 2026-10-12

Adminer is a web-based database management tool used by developers to manage databases including SQLite. An authenticated attacker with SQLite database access can bypass security restrictions by using a special UTF-8 byte-order mark character, allowing them to create executable PHP code files on the web server, leading to complete compromise of the server running as the web server user.

Technologies: Vrana Adminer. Vendors: Vrana.

Quick answers

Is CVE-2026-109347 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-109347 being exploited in the wild.
How severe is CVE-2026-109347?
High severity, with a CVSS score of 7.2, published 12 October 2026.
Which products and versions are affected?
Vrana Adminer before 6.1.1.
Is there a fix for CVE-2026-109347?
Yes: fixed in 6.1.1. Until then: Upgrade to Adminer 6.1.1 or restrict SQLite database access to trusted users only and ensure the PHP process cannot write to web-accessible directories. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-109347 attacked?
It is attacked over the network.
Am I affected by CVE-2026-109347?
Check whether you run Vrana Adminer at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

  • Fixed in: 6.1.1

Upgrade to Adminer 6.1.1 or restrict SQLite database access to trusted users only and ensure the PHP process cannot write to web-accessible directories.

Technical details

The vulnerability exists in Adminer's SQL statement filtering for SQLite, which uses regex to block dangerous ATTACH and VACUUM INTO statements but fails to normalize UTF-8 byte-order marks (BOM: EF BB BF) before pattern matching. An authenticated user can prefix these SQL commands with a BOM to bypass the filter; SQLite then strips the BOM and executes the statement. An attacker can use ATTACH to create a database file in a web-accessible PHP directory and CREATE TABLE with PHP code in the table name to achieve remote code execution as the web server user.

Affected products

  • vrana Adminer before 6.1.1

Timeline

  • 2026-09-25: disclosed
  • 2026-10-12: advisory

References

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