CVE-2026-46887 Auth bypass in Siebel Apps - Marketing

Critical 9.8 Published 16 Jun 2026 Updated 18 Jun 2026

Unauthenticated attackers can compromise Siebel Apps - Marketing 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-2026-46887?

CVE-2026-46887 is a critical authentication bypass vulnerability in Oracle Corporation Siebel Apps - Marketing, published on 16 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Vulnerability in the Siebel Apps - Marketing product of Oracle Siebel CRM (component: Marketing). Supported versions that are affected are 17.0-26.5. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP to compromise Siebel Apps - Marketing. Successful attacks of this vulnerability can result in takeover of Siebel Apps - Marketing. 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-284

Which versions are affected by CVE-2026-46887?

It affects 1 product.

Products include Oracle Siebel Apps - Marketing.

How do I fix CVE-2026-46887?

No fix has been published for CVE-2026-46887 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-2026-46887 being exploited?

There is no known exploitation of CVE-2026-46887 in the wild and no public exploit code.

Sources

Also known as GHSA-9866-q3mf-2f49.