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CVE-2026-83100 – Unauthenticated RCE / Full Takeover – Oracle Forms 12.2.1.19.0 and 14.1.2.0.0

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Summary

CVE-2026-83100 is a critical vulnerability in the Oracle Forms product of Oracle Fusion Middleware, stemming from missing/improper authentication for a critical function (CWE-306, CWE-287). It allows an unauthenticated attacker with network access via HTTP to fully compromise Oracle Forms. Oracle rates this as CVSS 9.8 (Critical), and it is described as "easily exploitable."

Technical details

  • Root cause: Missing authentication controls for a critical function within the Forms Services, C/S (client/server), and Charmode components of Oracle Forms.
  • Trigger conditions: No authentication or user interaction is required; the flaw is reachable by any attacker with network connectivity to the affected service.
  • Attack vector: Network-based, exploitable over HTTP (AV:N, AC:L, PR:N, UI:N per the CVSS vector).
  • Impact: Successful exploitation results in complete takeover of Oracle Forms, with high impact to confidentiality, integrity, and availability.

Affected software

  • Oracle Forms (Oracle Fusion Middleware) — component: Forms Services, C/S, Charmode
    • Version 12.2.1.19.0
    • Version 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 fix provided in Oracle’s September 2026 Critical Security Patch Update for the affected Oracle Forms versions (12.2.1.19.0 and 14.1.2.0.0).
  • If patching cannot be applied immediately: Restrict network access to Oracle Forms services (e.g., via firewall rules, VPN, or network segmentation) so they are not directly reachable from untrusted networks, and monitor for anomalous HTTP requests to Forms Services endpoints until the patch can be applied.

References

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