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CVE-2026-83105 – Unauthenticated Remote Takeover – Oracle Forms 12.2.1.19.0 and 14.1.2.0.0

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Summary

CVE-2026-83105 is a critical vulnerability in the Oracle Forms product of Oracle Fusion Middleware, affecting the Forms Services, C/S, and Charmode components. It allows an unauthenticated attacker with network access via HTTP to compromise Oracle Forms, and Oracle notes that successful attacks may significantly impact additional products beyond Oracle Forms itself due to a scope change. Oracle rates the flaw 9.0 (Critical) and describes it as "difficult to exploit."

Technical details

  • Root cause: A flaw within the Forms Services, C/S, and Charmode components of Oracle Forms; Oracle has not disclosed further technical root-cause detail publicly.
  • Trigger conditions: Oracle classifies the vulnerability as "difficult to exploit," implying non-trivial preconditions or attack complexity, consistent with the CVSS vector’s "High" Attack Complexity rating.
  • Attack vector: Network-based, reachable over HTTP, requiring no authentication and no user interaction.
  • Impact: A scope change (S:C) indicates the vulnerability can affect resources beyond Oracle Forms’ own security scope; Oracle states successful exploitation results in "takeover of Oracle Forms," with high impact to confidentiality, integrity, and availability.

Affected software

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

Severity

  • CVSS v3.1 Base Score: 9.0 (Critical)
  • Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H

Mitigation and recommended actions

  • Immediate: Apply the Oracle Critical Patch Update / Critical Security Patch Update dated September 2026, which addresses CVE-2026-83105 for Oracle Forms versions 12.2.1.19.0 and 14.1.2.0.0. Upgrade to the patched release identified in Oracle’s advisory for your specific version line.
  • If immediate patching is not possible: Oracle strongly recommends applying the patches as soon as possible and states that there are no complete workarounds; restrict network exposure of Oracle Forms deployments (e.g., limit access to trusted networks, place behind authentication proxies or VPNs, and monitor HTTP traffic to Forms Services endpoints) until the patch can be applied.

References

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