A critical flaw in Oracle E-Business Suite, tracked as CVE-2026-101767, lets an attacker with no
account and only web access take over the system. It is a SQL injection in a core EBS servlet that
chains to remote code execution. Oracle patched it in its October 2026 Critical Patch Update, and
threat intelligence firm Defused has already seen attackers probing the internet for vulnerable systems.
Oracle has not yet confirmed real-world break-ins through this flaw, but more than 670 EBS systems
are exposed online, and Oracle E-Business Suite has been a repeated target of data-theft gangs. Any
internet-facing EBS instance should be patched at once.
1. Vulnerability Details
CVE ID- CVE-2026-101767
CVSS SCORE- 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EXPLOIT STATUS- Scanning and exploratory exploits observed by Defused on 27 October 2026; not yet
confirmed exploited in the wild by Oracle.
The flaw is an unauthenticated SQL injection in the Thin Client Framework servlet of Oracle E-Business Suite’s
Application Object Library (component: Core), which chains to remote code execution. An attacker with only HTTP
network access and no credentials can exploit it in a low-complexity attack to take over the Application Object Library and
the wider EBS deployment (CWE-287 Improper Authentication, CWE-306 Missing Authentication for Critical Function).
The flaw was discovered by Horizon3.ai and fixed in Oracle’s October 2026 Critical Patch Update on 20 October 2026.
2. Affected Products & Fixed Versions
| COMPONENT | VULNERABLE VERSIONS | FIXED BUILD |
| Oracle E-Business Suite, Application Object Library (Core) | 12.2.3 to 12.2.15 | October 2026 Critical Patch Update |
3. Observed Activity
- Exploratory exploits (Defused, 27 Oct 2026) Defused reported that its Oracle EBS decoys recorded exploratory exploits against CVE-2026-101767 on the morning of 27 October 2026, describing it as an unauthenticated SQL injection in the Thin Client Framework servlet that chains to remote code execution. No public report of successful exploitation exists yet.
- Exposed attack surface Shadowserver tracks more than 670 internet-exposed Oracle EBS instances, most with United States IP addresses, though it does not say how many are patched or are honeypots. Oracle notes some customers have been compromised because they failed to apply available patches.
- History of targeting Oracle E-Business Suite and related suites are repeat targets of data-theft gangs, including Clop’s zero-day exploitation of CVE-2025-61882 against high-profile organisations and ShinyHunters’ PeopleSoft campaign, so a patch gap on EBS carries a high risk of follow-on extortion.
4. Recommendations
- Apply the Oracle October 2026 Critical Patch Update to all Oracle E-Business Suite 12.2.3 to 12.2.15 instances without delay; this is the fix for CVE-2026-101767.
- Identify every internet-exposed EBS instance and restrict access to the Thin Client Framework and other EBS servlets to trusted networks or a VPN while you confirm patch status.
- Review web server and application logs for SQL injection attempts against EBS servlet endpoints and for unexpected process execution or new files on EBS hosts; with active scanning under way, treat unpatched internet-facing instances as the top priority.
- Because Oracle EBS is a repeated Clop and ShinyHunters target, if you find signs of exploitation, activate incident response, preserve logs, and review for data staging and exfiltration rather than only patching.
5. Sources
- https://www.bleepingcomputer.com/news/security/hackers-now-scanning-systems-for-recently-pa
tched-oracle-flaw/ - https://x.com/DefusedCyber/status/2115099999973364147
- https://nvd.nist.gov/vuln/detail/CVE-2026-101767
- https://www.oracle.com/security-alerts/cpuoct2026.html
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