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CVE-2026-83099 – Unauthenticated Remote Takeover (RCE) – Oracle Forms 12.2.1.19.0 and 14.1.2.0.0

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Summary

CVE-2026-83099 is a critical vulnerability in Oracle Forms, part of Oracle Fusion Middleware, caused by missing/improper authentication in the Forms Services component. It allows an unauthenticated attacker with network access via HTTP to fully compromise the application, and its CVSS scope-changed rating means impact can extend to other Oracle products sharing the Forms deployment. The flaw carries the maximum CVSS v3.1 base score of 10.0.

Technical details

  • Root cause: missing authentication for a critical function in the Forms Services component (CWE-306), compounded by improper authentication handling (CWE-287).
  • Trigger conditions: no privileges or user interaction are required; the vulnerability is exploitable by sending crafted HTTP requests to the exposed Forms Services endpoint.
  • Attack vector: Network (AV:N), low attack complexity (AC:L), no privileges required (PR:N), no user interaction (UI:N).
  • Scope: Changed (S:C) — a successful attack can affect resources beyond the vulnerable Forms component itself, i.e., other Oracle products sharing the same environment.
  • Impact: High confidentiality, integrity, and availability impact (C:H/I:H/A:H) — attackers can take over the Oracle Forms application.

Affected software

  • Oracle Forms 12.2.1.19.0
  • Oracle Forms 14.1.2.0.0

Severity

  • CVSS v3.1 Base Score: 10.0 (Critical)
  • Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Mitigation and recommended actions

  • Immediate: Apply the Oracle Critical Security Patch Update released September 2026, which addresses this vulnerability in Oracle Forms 12.2.1.19.0 and 14.1.2.0.0. Upgrade to the patched release specified in Oracle’s advisory for your installed version.
  • If patching cannot be applied immediately: Restrict network access to the Oracle Forms Services endpoint (e.g., frmservlet) to trusted internal networks only, and monitor HTTP access logs for anomalous or unauthenticated requests to Forms Services paths until the patch is deployed.

References

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