CVE-2026-16146 Invisible Anti-Spam & CAPTCHA <= 5.1 - Authenticated (Editor+) SQL Injection via Pattern JSON Keys/Values
Authenticated editors can exploit SQL injection in the Invisible Anti-Spam & CAPTCHA plugin to extract sensitive database information.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-16146?
CVE-2026-16146 is a medium-severity SQL injection vulnerability in matthiasnordwig Invisible Anti-Spam & CAPTCHA — reCAPTCHA Alternative for All Forms, published on 15 Aug 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
The Invisible Anti-Spam & CAPTCHA — reCAPTCHA Alternative for All Forms plugin for WordPress is vulnerable to generic SQL Injection via Pattern JSON Keys/Values in all versions up to, and including, 5.1 due to insufficient escaping on the user supplied parameter and lack of sufficient preparation on the existing SQL query. This makes it possible for authenticated attackers, with editor-level access and above, to append additional SQL queries into already existing queries that can be used to extract sensitive information from the database.
Weakness: CWE-89
Which versions are affected by CVE-2026-16146?
How do I fix CVE-2026-16146?
No fix has been published for CVE-2026-16146 yet. Limit exposure of the affected software until one is available.
Use parameterised queries everywhere and never build SQL by joining strings. Upgrade affected software first; a web application firewall only buys time. More about SQL injection.
Is CVE-2026-16146 being exploited?
There is no known exploitation of CVE-2026-16146 in the wild and no public exploit code.
Sources
Also known as GHSA-xxj3-7fh5-vvxc.