CVE-2026-21967 Missing authorization in Oracle Hospitality OPERA 5

High 8.6 Published 20 Jan 2026 Updated 21 Jan 2026

Unauthenticated attackers can access critical data, modify records, and cause partial denial of service in Oracle Hospitality OPERA 5.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2026-21967?

CVE-2026-21967 is a high-severity missing authorization vulnerability in Oracle Hospitality OPERA 5, published on 20 Jan 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Vulnerability in the Oracle Hospitality OPERA 5 product of Oracle Hospitality Applications (component: Opera Servlet). Supported versions that are affected are 5.6.19.23, 5.6.25.17, 5.6.26.10 and 5.6.27.4. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP to compromise Oracle Hospitality OPERA 5. Successful attacks of this vulnerability can result in unauthorized access to critical data or complete access to all Oracle Hospitality OPERA 5 accessible data as well as unauthorized update, insert or delete access to some of Oracle Hospitality OPERA 5 accessible data and unauthorized ability to cause a partial denial of service (partial DOS) of Oracle Hospitality OPERA 5. CVSS 3.1 Base Score 8.6 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L).

Which versions are affected by CVE-2026-21967?

It affects 1 product.

Products include Oracle Hospitality Opera 5.

How do I fix CVE-2026-21967?

No fix has been published for CVE-2026-21967 yet. Limit exposure of the affected software until one is available.

Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.

Is CVE-2026-21967 being exploited?

There is no known exploitation of CVE-2026-21967 in the wild and no public exploit code.

Sources

Also known as GHSA-jqm3-f272-rrx3.