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CVE-2026-83098 – Unauthenticated Remote Code Execution / Complete System Takeover – Oracle Forms 12.

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Summary

CVE-2026-83098 is a critical vulnerability in the Forms Services component of Oracle Forms (part of Oracle Fusion Middleware). It allows an unauthenticated, network-based attacker to fully compromise Oracle Forms over HTTP, with no user interaction required. Oracle rates this vulnerability as easily exploitable and assigns it a maximum-severity CVSS v3.1 score of 9.8.

Technical details

  • Root cause: the Forms Services component (C/S, Charmode) is affected by missing/improper authentication for a critical function, allowing access without valid credentials.
  • Trigger conditions: the flaw is reachable by any attacker with network access to the affected HTTP-exposed Oracle Forms deployment; no authentication or user interaction is needed.
  • Attack vector: network (AV:N), low attack complexity (AC:L), no privileges required (PR:N), no user interaction (UI:N).
  • Impact: successful exploitation results in complete takeover of Oracle Forms, with full loss of confidentiality, integrity, and availability (C:H/I:H/A:H).

Affected software

  • Oracle Forms (Oracle Fusion Middleware) 12.2.1.19.0
  • Oracle Forms (Oracle Fusion Middleware) 14.1.2.0.0

Severity

  • CVSS v3.1 Base Score: 9.8 (Critical)
  • CVSS 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 Patch Update (Critical Security Patch Update) for Oracle Fusion Middleware, updating affected Oracle Forms deployments (12.2.1.19.0 and 14.1.2.0.0) to the patched release specified in that advisory.
  • If immediate patching is not possible: restrict network access to Oracle Forms HTTP endpoints (e.g., via firewall rules, VPN, or network segmentation) to trusted hosts only, and monitor for anomalous unauthenticated requests to Forms Services until the patch can be applied. Oracle advises that such network-level mitigations are temporary and may impact functionality, so patching remains the recommended long-term fix.

References

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