CVE-2026-21931 Cross-site request forgery in Oracle APEX Sample Applications

Medium 5.4 Published 20 Jan 2026 Updated 21 Jan 2026

Low-privileged attackers can trick users into modifying or reading sample application data via CSRF in Oracle APEX.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Over the internet
Victim action needed: A user has to click or open something
Fix: None listed

What is CVE-2026-21931?

CVE-2026-21931 is a medium-severity vulnerability in Oracle APEX Sample Applications, published on 20 Jan 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

Official description

Vulnerability in the Oracle APEX Sample Applications product of Oracle APEX (component: Brookstrut Sample App). Supported versions that are affected are 23.2.0, 23.2.1, 24.1.0, 24.2.0 and 24.2.1. Easily exploitable vulnerability allows low privileged attacker with network access via HTTP to compromise Oracle APEX Sample Applications. Successful attacks require human interaction from a person other than the attacker and while the vulnerability is in Oracle APEX Sample Applications, attacks may significantly impact additional products (scope change). Successful attacks of this vulnerability can result in unauthorized update, insert or delete access to some of Oracle APEX Sample Applications accessible data as well as unauthorized read access to a subset of Oracle APEX Sample Applications accessible data. CVSS 3.1 Base Score 5.4 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N).

Which versions are affected by CVE-2026-21931?

It affects 1 product.

Products include Oracle Apex.

How do I fix CVE-2026-21931?

No fix has been published for CVE-2026-21931 yet. Limit exposure of the affected software until one is available.

Is CVE-2026-21931 being exploited?

There is no known exploitation of CVE-2026-21931 in the wild and no public exploit code.

Sources

Also known as GHSA-4f9w-qx2j-3j6q.