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CVE-2026-83265 – Unauthenticated Data Exposure / Integrity Compromise – Oracle Web Services Manager

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Summary

CVE-2026-83265 is a high-severity vulnerability in the Web Services Agent component of Oracle Web Services Manager (part of Oracle Fusion Middleware). It allows a completely unauthenticated, remote attacker with only network access via HTTP to compromise the product, resulting in unauthorized read access to critical data and unauthorized update, insert, or delete access to some accessible data. Oracle rates this as easily exploitable with a CVSS v3.1 base score of 8.2 (High).

Technical details

  • Root cause: A flaw in the Web Services Agent component of Oracle Web Services Manager that fails to properly enforce authentication/authorization on requests it processes.
  • Trigger conditions: No authentication or user interaction is required; the attacker only needs network-level HTTP access to a reachable Web Services Manager deployment.
  • Attack vector: Network (AV:N), low attack complexity (AC:L), no privileges required (PR:N), no user interaction (UI:N).
  • Impact: Successful exploitation can grant complete access to all data accessible to Oracle Web Services Manager (high confidentiality impact) and allows unauthorized update, insert, or delete operations on some of that data (low integrity impact). No impact to availability was reported.

Affected software

  • Oracle Web Services Manager 12.2.1.4.0 (Oracle Fusion Middleware)
  • Oracle Web Services Manager 14.1.2.0.0 (Oracle Fusion Middleware)

Severity

  • CVSS v3.1 Base Score: 8.2 (High)
  • Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N

Mitigation and recommended actions

  • Immediate: Apply the Oracle Security Alert patches referenced in the September 2026 Critical Security Patch Update (cspusep2026) for the affected Oracle Web Services Manager versions (12.2.1.4.0 and 14.1.2.0.0). Oracle states patches for this vulnerability must be obtained through the referenced Security Alert/Critical Security Patch Update; the vulnerability cannot be otherwise mitigated without applying the vendor fix.
  • If immediate patching is not possible: Restrict network access to Oracle Web Services Manager endpoints (e.g., limit exposure to trusted internal networks or VPN, place behind a properly configured reverse proxy/WAF) as a temporary compensating control until the patch can be applied. Oracle’s standard guidance for unauthenticated, network-exploitable Fusion Middleware flaws is that no long-term workaround substitutes for patching.
  • Monitor Oracle Fusion Middleware and Web Services Manager logs for anomalous unauthenticated HTTP requests to Web Services Agent endpoints.

References

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