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CVE-2026-61238 – Unauthorized Data Access and Modification – Oracle PeopleSoft Enterprise FIN Com…

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Summary

CVE-2026-61238 is a critical unauthorized data access and modification vulnerability in the eProcurement component of Oracle PeopleSoft Enterprise FIN Common Objects Argentina, version 9.1. The flaw can be exploited by an unauthenticated attacker over HTTP with no user interaction required, granting full read access to and the ability to create, delete, or modify all data accessible within the affected PeopleSoft instance. It was disclosed on July 21, 2026 as part of Oracle’s July 2026 Critical Patch Update — the largest Oracle CPU on record, addressing 1,235 CVEs — and carries a CVSS v3.1 base score of 9.1 (Critical).

Technical details

  • Root cause: Improper access control in the eProcurement component of Oracle PeopleSoft Enterprise FIN Common Objects Argentina, permitting unauthenticated HTTP requests to perform privileged data operations.
  • Trigger conditions: Oracle characterizes this vulnerability as "easily exploitable" — it requires no authentication, no user interaction, and low attack complexity. An attacker needs only network connectivity to the target PeopleSoft instance.
  • Attack vector: Fully network-based, exploitable over HTTP. No local or adjacent access is required.
  • Impact: Successful exploitation yields both complete unauthorized read access to all data accessible within the PeopleSoft instance (high confidentiality impact) and the ability to perform unauthorized creation, deletion, or modification of critical data (high integrity impact). Availability is not directly impacted.

Affected software

  • Oracle PeopleSoft Enterprise FIN Common Objects Argentina, version 9.1 (eProcurement component)

Severity

  • CVSS v3.1 Base Score: 9.1 (Critical)
  • Vector String: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Mitigation and recommended actions

  • Immediate: Apply Oracle’s July 2026 Critical Patch Update (released July 21, 2026), which contains the fix for CVE-2026-61238. Patches are available through Oracle Support (My Oracle Support portal).
  • If patching is delayed: Restrict inbound HTTP/HTTPS access to the PeopleSoft instance to trusted IP ranges only, blocking all unauthenticated external network access until the patch can be applied.
  • Organizations that do not use the Argentina localization module should verify this configuration to accurately assess their exposure to this specific CVE.

Broader context: Oracle PeopleSoft has been a high-value target for threat actors in 2026. A documented exploitation campaign compromised over 300 internet-exposed PeopleSoft instances across more than 100 organizations, targeting sensitive financial, HR, and academic records. Internet-facing PeopleSoft deployments should be treated as elevated-risk assets and prioritized for patching.

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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1

Map your entire attack surface (continously)

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