CVE-2026-61140 Auth bypass in Oracle WebCenter Sites

Critical 9.8 Published 21 Jul 2026 Updated 1 Aug 2026

Unauthenticated attackers can compromise Oracle WebCenter Sites via HTTP, leading to full system takeover.

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-2026-61140?

CVE-2026-61140 is a critical authentication bypass vulnerability in Oracle Webcenter Sites, published on 21 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Vulnerability in the Oracle WebCenter Sites product of Oracle Fusion Middleware (component: WebCenter Sites). The supported version that is affected is 14.1.2.0.0. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP to compromise Oracle WebCenter Sites. Successful attacks of this vulnerability can result in takeover of Oracle WebCenter Sites. CVSS 3.1 Base Score 9.8 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).

Weakness: CWE-306, CWE-284

Which versions are affected by CVE-2026-61140?

It affects 1 product.

Products include Oracle Webcenter Sites.

How do I fix CVE-2026-61140?

No fix has been published for CVE-2026-61140 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-2026-61140 being exploited?

There is no known exploitation of CVE-2026-61140 in the wild and no public exploit code.

All Oracle Webcenter Sites vulnerabilities

Sources

Also known as GHSA-vm23-97ff-m564.