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CVE-2026-61237 – Unauthenticated Access Control Bypass – Oracle PeopleSoft Enterprise FIN Common …

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Summary

CVE-2026-61237 is a critical-severity Improper Access Control vulnerability (CWE-284, CWE-269) in the Integration component of Oracle PeopleSoft Enterprise FIN Common Objects Argentina version 9.1, disclosed as part of Oracle’s July 2026 Critical Patch Update (CPU) on July 21, 2026. The vulnerability is network-accessible via HTTP, requires no authentication and no user interaction, and carries a CVSS v3.1 base score of 9.9 (Critical). Successful exploitation can lead to full unauthorized access to sensitive financial data and cross-component impact on the host environment.

Technical details

  • Root cause: Improper Access Control (CWE-284) and Improper Privilege Management (CWE-269) within the Integration component of the PeopleSoft FIN Argentina localization module.
  • Trigger conditions: The vulnerability is classified as "easily exploitable" with no prerequisites — no credentials, no special configuration, and no user interaction are required.
  • Attack vector: Remotely exploitable over the network via HTTP; accessible from the public internet on instances with internet-facing PeopleSoft portals.
  • Impact: High confidentiality impact — an unauthenticated attacker can gain unauthorized access to critical financial data. Partial integrity (I:L) and partial availability (A:L) impacts are also present. The Changed Scope (S:C) metric indicates exploitation can affect components or resources beyond the directly targeted PeopleSoft module, amplifying risk across the hosting environment.

Affected software

  • Oracle PeopleSoft Enterprise FIN Common Objects Argentina, version 9.1

Severity

  • CVSS v3.1 Base Score: 9.9 (Critical)
  • Vector String: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:L

Mitigation and recommended actions

  • Immediate: Apply Oracle’s July 2026 Critical Patch Update (CPU), released July 21, 2026. Oracle’s advisory at https://www.oracle.com/security-alerts/cpujul2026.html contains the relevant patch and installation guidance for affected PeopleSoft environments.
  • Network mitigation (if patching is not immediately possible): Restrict external internet access to PeopleSoft Integration Gateway endpoints and financial module URLs at the network perimeter. Limit inbound HTTP/HTTPS traffic to trusted IP ranges only.
  • Customers should also audit internet-facing PeopleSoft deployments to confirm whether the Argentina localization module (FIN Common Objects Argentina) is installed and active.

IONIX Status

The IONIX research team is tracking ongoing exploitation attempts and recommends immediate patching. Potentially affected assets are outlined in this post.

References

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