Key points
- CVE-2026-101767 affects Oracle E-Business Suite versions 12.2.3 through 12.2.15.
- The vulnerability allows unauthenticated remote code execution via the TCF servlet.
- Oracle released patches in its October 2026 Critical Patch Update advisory.
An attacker with network access to an affected Oracle E-Business Suite instance can execute operating system commands without providing any credentials. This capability arises from a critical SQL injection flaw in the Thin Client Framework servlet, which Horizon3 researchers identified as easily exploitable over HTTP or HTTPS.
In plain English
The vulnerability exists in the Oracle Application Object Library component of Oracle E-Business Suite. Specifically, it targets the TCF servlet located at the /OA_HTML/AppsTCFServer endpoint. Because this address is permitted by default firewall configurations, internet-facing deployments are directly exposed to unauthenticated attacks.
The background
Horizon3 disclosed this zero-day flaw to Oracle on 24 July 2026, according to the research firm. Oracle subsequently addressed the issue in its October 2026 Critical Patch Update, released on 20 October 2026. The flaw impacts versions 12.2.3 through 12.2.15 of the E-Business Suite platform.
What changes now
Successful exploitation allows attackers to read or modify sensitive data, including financial and payroll records, accessible to the APPS database user. Furthermore, they can run commands on the application host with the privileges of the EBS application account, potentially leading to full system takeover.
The attacker's path
Teams usually monitor for unauthenticated web requests followed by immediate database activity, which often signals reconnaissance. Check whether the target servlet is accessible from untrusted networks, as this exposure simplifies initial access. Look for unexpected file creation in temporary directories or shell processes spawned by application services, which indicate successful command execution.
What to do and how to stay safe: Oracle
- Apply the Oracle October 2026 Critical Patch Update immediately to all affected E-Business Suite installations.
- Restrict network access to the EBS web tier so that only trusted internal networks can reach the servlet.
- Monitor application hosts and databases for signs of compromise, such as unexpected shell processes or file modifications.
Step-by-step guide: Emergency Patching: Correcting Five Common Operational Errors
General security guidance from the RedTeam Log newsroom. It is not confirmed advice from the organisations named in this story.
Frequently asked questions
Which Oracle E-Business Suite versions are affected by CVE-2026-101767?
Versions 12.2.3 through 12.2.15 are affected by this vulnerability.
Is authentication required to exploit this flaw?
No, the vulnerability allows unauthenticated attackers to exploit it with only network access.
When did Oracle release patches for this issue?
Oracle released the patches in its October 2026 Critical Patch Update on 20 October 2026.
