CVE-2026-46839 Auth bypass in Oracle REST Data Services

Critical 9.9 Published 28 May 2026 Updated 29 May 2026

A low-privileged attacker can exploit this vulnerability to take over Oracle REST Data Services, impacting confidentiality, integrity, and availability.

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

What is CVE-2026-46839?

CVE-2026-46839 is a critical authentication bypass vulnerability in Oracle REST Data Services, published on 28 May 2026. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

Vulnerability in Oracle REST Data Services (component: Core). Supported versions that are affected are 24.2.0-26.1.0. Easily exploitable vulnerability allows low privileged attacker with network access via HTTPS to compromise Oracle REST Data Services. While the vulnerability is in Oracle REST Data Services, attacks may significantly impact additional products (scope change). Successful attacks of this vulnerability can result in takeover of Oracle REST Data Services. CVSS 3.1 Base Score 9.9 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H).

Weakness: CWE-284

Which versions are affected by CVE-2026-46839?

It affects 1 product.

Products include Oracle Rest Data Services.

How do I fix CVE-2026-46839?

No fix has been published for CVE-2026-46839 yet. Limit exposure of the affected software until one is available.

Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.

Is CVE-2026-46839 being exploited?

There is no known exploitation of CVE-2026-46839 in the wild and no public exploit code.

Sources

Also known as GHSA-4c2q-9g38-8v79.