CVE-2026-46840 Auth bypass in Oracle REST Data Services

Critical 10.0 Published 28 May 2026 Updated 29 May 2026

Unauthenticated attackers can take over Oracle REST Data Services via network access, leading to full system compromise.

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-2026-46840?

CVE-2026-46840 is a critical authentication bypass vulnerability in Oracle REST Data Services, published on 28 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Vulnerability in Oracle REST Data Services (component: Backend-as-a-Service). Supported versions that are affected are 24.2.0-26.1.0. Easily exploitable vulnerability allows unauthenticated 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 10.0 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H).

Weakness: CWE-306, CWE-287, CWE-284

Which versions are affected by CVE-2026-46840?

It affects 1 product.

Products include Oracle Rest Data Services.

How do I fix CVE-2026-46840?

No fix has been published for CVE-2026-46840 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-2026-46840 being exploited?

There is no known exploitation of CVE-2026-46840 in the wild and no public exploit code.

Sources

Also known as GHSA-2gr4-fx2q-v5vq.