Summary
CVE-2026-83094 is a critical missing/improper authentication vulnerability (CWE-306, CWE-287) in the Forms Services, C/S, Charmode component of Oracle Forms (part of Oracle Fusion Middleware). It allows an unauthenticated attacker with network access via HTTP to compromise and fully take over Oracle Forms. Oracle rates it CRITICAL with a CVSS 3.1 base score of 9.8, and it was disclosed in the September 2026 Critical Patch Update.
Technical details
- Root cause: missing authentication for a critical function combined with an improper authentication mechanism in the Forms Services, C/S, Charmode component.
- Trigger conditions: no authentication or user interaction is required; the flaw is remotely and "easily exploitable" per Oracle’s advisory.
- Attack vector: network access over HTTP, with low attack complexity and no privileges required.
- Impact: successful exploitation results in complete takeover of Oracle Forms, with high impact to confidentiality, integrity, and availability.
Affected software
- Oracle Forms 12.2.1.19.0
- Oracle Forms 14.1.2.0.0
Severity
- CVSS v3.1 Base Score: 9.8 (Critical)
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Mitigation and recommended actions
- Immediate: Apply the Oracle Critical Patch Update for September 2026, which contains the fix for CVE-2026-83094, to all affected Oracle Forms 12.2.1.19.0 and 14.1.2.0.0 deployments.
- If patching cannot be applied immediately: restrict network access to Oracle Forms servers (e.g., limit exposure to trusted networks only, place behind authenticated reverse proxies/VPN, and block direct internet access to the Forms servlet) until the patch can be applied, and monitor for anomalous unauthenticated access attempts.

