CVE-2026-70859 Auth bypass in Siebel CRM Integration

High 8.5 Published 18 Aug 2026 Updated 20 Aug 2026

A low-privileged attacker can compromise Siebel CRM Integration via HTTP, leading to full system takeover and significant impact on additional products.

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-2026-70859?

CVE-2026-70859 is a high-severity authentication bypass vulnerability in Oracle Siebel Crm, published on 18 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

Vulnerability in the Siebel CRM Integration product of Oracle Siebel CRM (component: REST). Supported versions that are affected are 17.0-26.6. Difficult to exploit vulnerability allows low privileged attacker with network access via HTTP to compromise Siebel CRM Integration. While the vulnerability is in Siebel CRM Integration, attacks may significantly impact additional products (scope change). Successful attacks of this vulnerability can result in takeover of Siebel CRM Integration. CVSS 3.1 Base Score 8.5 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H).

Weakness: CWE-284

Which versions are affected by CVE-2026-70859?

It affects 1 product.

Products include Oracle Siebel Crm.

How do I fix CVE-2026-70859?

No fix has been published for CVE-2026-70859 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-2026-70859 being exploited?

There is no known exploitation of CVE-2026-70859 in the wild and no public exploit code.

All Oracle Siebel Crm vulnerabilities

Sources

Also known as GHSA-8mmw-j5gh-hf7r.