CVE-2026-61253: Oracle HRMS Japanese CSRF Vulnerability

CVE-2026-61253 Overview

CVE-2026-61253 is a Cross-Site Request Forgery (CSRF) vulnerability [CWE-352] affecting the Oracle Payroll Japanese component of the Oracle HRMS (Japanese) product within Oracle E-Business Suite. Supported versions 12.2.3 through 12.2.15 are affected. An unauthenticated attacker with network access via HTTPS can exploit this issue, but successful attacks require interaction from a user other than the attacker. Exploitation can result in unauthorized update, insert, or delete access to some Oracle HRMS (Japanese) data, and unauthorized read access to a subset of accessible data.

Critical Impact
Successful exploitation allows an unauthenticated remote attacker to alter and read a subset of Oracle HRMS (Japanese) data by tricking an authenticated user into loading a malicious request.

Affected Products

Oracle E-Business Suite — Oracle HRMS (Japanese), component Oracle Payroll Japanese
Affected versions: 12.2.3 through 12.2.15

Discovery Timeline

2026-07-21 - CVE-2026-61253 published to NVD
2026-07-22 - Last updated in NVD database
July 2026 - Addressed in the Oracle Critical Patch Update July 2026

Technical Details for CVE-2026-61253

Vulnerability Analysis

The vulnerability is classified as Cross-Site Request Forgery [CWE-352] in the Oracle Payroll Japanese component. The affected application does not adequately verify that incoming state-changing HTTP requests originate from a legitimate, user-initiated action within the trusted application context. An attacker who lures an authenticated Oracle HRMS (Japanese) user to a malicious page can cause that user's browser to issue forged requests against the E-Business Suite instance.

Exploitation requires user interaction from a person other than the attacker, typically a signed-in HRMS user. The attack traverses the network over HTTPS and does not require the attacker to hold any credentials on the target system. Impact is bounded to partial confidentiality and integrity loss, with no direct availability impact.

Root Cause

The root cause is missing or insufficient anti-CSRF protection on state-changing endpoints in the Oracle Payroll Japanese component. Requests are processed based on the authenticated session cookie without validating an unpredictable, per-request token bound to the user's session or verifying request origin.

Attack Vector

An attacker crafts a web page, email, or link containing HTML or JavaScript that submits a request to the target Oracle E-Business Suite endpoint. When an authenticated HRMS user loads the attacker-controlled content, the browser automatically attaches the user's session cookies and issues the forged request. The server processes the request as if it were legitimate, enabling unauthorized read of a subset of HRMS data and unauthorized create, update, or delete operations against some accessible records.

No verified public proof-of-concept code is available for this issue. See the Oracle Critical Patch Update July 2026 advisory for vendor-supplied technical details.

Detection Methods for CVE-2026-61253

Indicators of Compromise

HTTP requests to Oracle Payroll Japanese endpoints containing Referer or Origin headers pointing to untrusted external domains.
Unexpected create, update, or delete operations on HRMS Japanese payroll records tied to user sessions that were browsing external sites at the time of the action.
Web access logs showing state-changing POST requests to HRMS endpoints immediately following navigation from third-party URLs.

Detection Strategies

Correlate E-Business Suite application audit records with HTTP access logs to identify state-changing requests lacking a valid same-origin Referer.
Deploy web application firewall rules that flag requests to sensitive HRMS endpoints missing expected anti-CSRF tokens or session context.
Review Oracle E-Business Suite sign-on and change audit tables for anomalous modifications performed under legitimate user sessions.

Monitoring Recommendations

Continuously monitor Oracle HRMS payroll tables for unauthorized inserts, updates, and deletes and alert on out-of-hours changes.
Alert on outbound browser-driven requests to E-Business Suite hosts originating from webmail, chat, or unknown external referrers.
Track privileged HRMS users whose accounts perform state changes within seconds of loading external content.

How to Mitigate CVE-2026-61253

Immediate Actions Required

Apply the fixes shipped in the Oracle Critical Patch Update of July 2026 to all Oracle E-Business Suite instances running versions 12.2.3 through 12.2.15.
Restrict network exposure of the E-Business Suite front-end to trusted networks and VPN users where feasible.
Instruct HRMS users not to browse untrusted sites or open unsolicited links while authenticated to E-Business Suite.

Patch Information

Oracle addressed CVE-2026-61253 in the Oracle Critical Patch Update July 2026. Administrators should apply the July 2026 CPU patches for Oracle E-Business Suite 12.2 following Oracle's documented patch application procedure and verify version status after installation.

Workarounds

Enforce short session lifetimes and require re-authentication for sensitive HRMS operations to reduce the window in which CSRF can succeed.
Configure browsers and enterprise policy to isolate E-Business Suite sessions from general web browsing, for example by using a dedicated browser profile.
Deploy WAF or reverse proxy rules that reject state-changing requests to HRMS endpoints when Origin or Referer headers do not match the trusted application host.

bash

# Example WAF rule concept: reject state-changing requests to HRMS endpoints
# that lack a same-origin Referer header (adapt to your WAF syntax)
SecRule REQUEST_METHOD "@rx ^(POST|PUT|DELETE)$" \
  "chain,phase:1,deny,status:403,id:1026612530,\
   msg:'CVE-2026-61253: Possible CSRF against Oracle HRMS Japanese'"
  SecRule REQUEST_URI "@beginsWith /OA_HTML/" \
    "chain"
    SecRule &REQUEST_HEADERS:Referer "@eq 0"