CVE-2026-61261: Oracle Knowledge Management Auth Bypass

CVE-2026-61261 Overview

CVE-2026-61261 is an access control vulnerability [CWE-284] in the Oracle Knowledge Management product, part of Oracle E-Business Suite. The flaw resides in the User Interface component and affects supported versions 12.2.3 through 12.2.15. A low-privileged attacker with network access via HTTP can exploit the weakness without user interaction. Successful exploitation results in unauthorized update, insert, or delete access to a subset of Oracle Knowledge Management data, along with unauthorized read access to a limited data subset. Oracle disclosed the issue in the Oracle Critical Patch Update Advisory published in July 2026.

Critical Impact
Authenticated attackers with minimal privileges can modify and read Oracle Knowledge Management data over the network, compromising the integrity and confidentiality of business knowledge assets.

Affected Products

Oracle E-Business Suite — Oracle Knowledge Management
Supported versions 12.2.3 through 12.2.15
Component: User Interface

Discovery Timeline

2026-07-21 - CVE-2026-61261 published to NVD
2026-07-22 - Last updated in NVD database
Vendor advisory published in the Oracle Security Alert July 2026

Technical Details for CVE-2026-61261

Vulnerability Analysis

The vulnerability is classified as Improper Access Control [CWE-284] in the User Interface component of Oracle Knowledge Management. An attacker requires only low-level privileges and network access over HTTP to reach the vulnerable interface. No user interaction is required, and the attack complexity is low, making exploitation straightforward for any authenticated user of the E-Business Suite environment.

Successful exploitation impacts both confidentiality and integrity. Attackers can perform unauthorized insert, update, or delete operations against a subset of Oracle Knowledge Management data. They can also read a limited subset of data they should not be able to access. Availability is not affected.

Oracle Knowledge Management is a customer-facing knowledge base module frequently exposed to internal users and, in some deployments, to external customer service portals. This broad accessibility increases the practical exposure of the vulnerable UI endpoints.

Root Cause

Oracle has not released a public technical breakdown of the root cause. Based on the CWE-284 classification, the underlying weakness involves missing or improperly enforced authorization checks in one or more Knowledge Management UI endpoints. The endpoints trust the caller's session context without validating that the user is entitled to perform the requested read or write action.

Attack Vector

The attacker authenticates to Oracle E-Business Suite with any low-privileged account. From that session, the attacker issues crafted HTTP requests to the Knowledge Management User Interface endpoints. Because authorization checks are insufficient, the requests execute operations outside the user's granted permission set. No client-side interaction, phishing, or chained vulnerability is required.

Exploitation code has not been publicly released. The EPSS score is 0.22% with a percentile of 12.647, reflecting a low observed likelihood of exploitation activity at time of publication.

See the Oracle Security Alert July 2026 for vendor-provided technical details.

Detection Methods for CVE-2026-61261

Indicators of Compromise

Unexpected create, update, or delete events in Oracle Knowledge Management content tables originating from low-privileged user sessions.
HTTP requests to Knowledge Management UI endpoints from accounts that do not normally interact with the module.
Anomalous read patterns against knowledge base records outside a user's assigned role scope.

Detection Strategies

Correlate E-Business Suite application audit logs with user role assignments to surface requests that exceed a user's authorized function set.
Monitor HTTP access logs on the Oracle HTTP Server tier for spikes in requests to Knowledge Management UI paths from non-administrative accounts.
Enable and review Oracle E-Business Suite Sign-On Audit and Page Access Tracking data for Knowledge Management pages.

Monitoring Recommendations

Forward E-Business Suite application, database audit, and web tier logs to a centralized SIEM for correlation and long-term retention.
Baseline normal Knowledge Management access patterns per role, then alert on deviations such as write operations from read-only users.
Alert on privilege-context anomalies where session privileges do not match the sensitivity of the record being accessed.

How to Mitigate CVE-2026-61261

Immediate Actions Required

Apply the fixes provided in the Oracle Critical Patch Update for July 2026 to all Oracle E-Business Suite instances running versions 12.2.3 through 12.2.15.
Inventory all Knowledge Management deployments, including internet-facing customer portals, and prioritize those first.
Review recent Knowledge Management audit records for unauthorized modifications made prior to patching.

Patch Information

Oracle addressed CVE-2026-61261 in the July 2026 Critical Patch Update. Administrators should download and apply the relevant Knowledge Management patches for Oracle E-Business Suite 12.2 as documented in the Oracle Security Alert July 2026. Oracle recommends applying Critical Patch Update fixes without delay.

Workarounds

Restrict network access to Oracle E-Business Suite Knowledge Management endpoints to trusted network segments until patches are applied.
Review and tighten Knowledge Management responsibilities and function security assignments to minimize the number of low-privileged users who can reach the vulnerable UI.
Increase logging verbosity on the Oracle HTTP Server and application tiers to capture request-level evidence during the patch window.

bash

# Example: apply Oracle E-Business Suite CPU patch using adop
# Replace <PATCH_NUMBER> with the patch identifier from the July 2026 CPU README
source $APPL_TOP/APPS<CONTEXT_NAME>.env
adop phase=prepare
adop phase=apply patches=<PATCH_NUMBER> workers=8
adop phase=finalize
adop phase=cutover
adop phase=cleanup