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CVE-2026-61033 – Unauthenticated Data Exposure and Integrity Impact – Oracle WebCenter Sites 12.2.1.

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Summary

CVE-2026-61033 is a high-severity vulnerability in the WebCenter Sites component of Oracle WebCenter Sites. It allows a remote, unauthenticated attacker with network access via HTTP to compromise the application, resulting in unauthorized access to a broad set of sensitive data along with limited ability to modify data and degrade availability. The flaw was disclosed by Oracle as part of its August 2026 Critical Security Patch Update.

Technical details

  • Root cause: A flaw in the WebCenter Sites component of Oracle WebCenter Sites that is remotely reachable without authentication.
  • Trigger conditions: Exploitation requires no authentication and no user interaction; Oracle rates the attack complexity as Low, meaning no special access conditions or reconnaissance beyond standard access to the HTTP interface are needed.
  • Attack vector: Network-based, delivered over HTTP directly to the WebCenter Sites application.
  • Impact: Successful exploitation can grant unauthorized access to a wide range of critical/sensitive data (high confidentiality impact), permit limited unauthorized modification of some data (low integrity impact), and cause limited disruption to availability (low availability impact). The vulnerability scope is rated "Unchanged," meaning the impact is confined to the vulnerable WebCenter Sites component itself.

Affected software

  • Oracle WebCenter Sites, version 12.2.1.4.0
  • Oracle WebCenter Sites, version 14.1.2.0.0

Severity

  • CVSS v3.1 Base Score: 8.6 (High)
  • Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L

Mitigation and recommended actions

  • Immediate: Apply the Oracle Critical Security Patch Update (CSPU) for August 2026, which contains the fix for CVE-2026-61033 in Oracle WebCenter Sites 12.2.1.4.0 and 14.1.2.0.0. Oracle strongly recommends applying the update without delay, as this and other patches in the same advisory address remotely exploitable, unauthenticated vulnerabilities.
  • If immediate patching is not possible: Restrict network exposure of WebCenter Sites management and application interfaces to trusted networks only (e.g., via firewall rules or VPN), and monitor HTTP access logs for anomalous or unauthorized requests to the WebCenter Sites application until the patch can be applied. Oracle notes that it has not received reports of exploitation and that partial application of the update is not supported — the full patch for the affected component should be applied.

References

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