CVE-2026-47018 Denial of service in Siebel CRM Cloud Applications

High 7.5 Published 21 Jul 2026 Updated 23 Jul 2026

Unauthenticated attackers can cause a complete denial of service in Siebel CRM Cloud Applications via network access.

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-2026-47018?

CVE-2026-47018 is a high-severity denial of service vulnerability in Oracle Siebel Crm, 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 Siebel CRM Cloud Applications product of Oracle Siebel CRM (component: Siebel Cloud Manager). Supported versions that are affected are 22.3-26.5. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTPS to compromise Siebel CRM Cloud Applications. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of Siebel CRM Cloud Applications. CVSS 3.1 Base Score 7.5 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).

Weakness: CWE-400

Which versions are affected by CVE-2026-47018?

It affects 1 product.

Products include Oracle Siebel Crm.

How do I fix CVE-2026-47018?

No fix has been published for CVE-2026-47018 yet. Limit exposure of the affected software until one is available.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2026-47018 being exploited?

There is no known exploitation of CVE-2026-47018 in the wild and no public exploit code.

All Oracle Siebel Crm vulnerabilities

Sources

Also known as GHSA-vjr3-852x-r77q.