CVE-2025-2669: IBM Db2 Privilege Escalation Vulnerability

CVE-2025-2669 Overview

CVE-2025-2669 affects IBM Db2 on Cloud Pak for Data and Db2 Warehouse on Cloud Pak for Data across versions 4.8, 5.0, 5.1, 5.2, and 5.3. The vulnerability stems from improper certificate validation [CWE-295] in the token validation logic. A privileged user can leverage this weakness to perform unauthorized operations and access sensitive information beyond their assigned authority. The issue carries network attack vector characteristics and requires authenticated access with high privileges. IBM has published an advisory through its support portal addressing the affected releases.

Critical Impact
Privileged users can bypass authority boundaries to access sensitive data and execute operations outside their permitted scope, undermining tenant isolation within Cloud Pak for Data deployments.

Affected Products

IBM Db2 on Cloud Pak for Data versions 4.8, 5.0, 5.1, 5.2, 5.3
IBM Db2 Warehouse on Cloud Pak for Data versions 4.8, 5.0, 5.1, 5.2, 5.3
Deployments relying on token-based authentication within affected Cloud Pak for Data releases

Discovery Timeline

2026-06-22 - CVE-2025-2669 published to NVD
2026-06-22 - Last updated in NVD database

Technical Details for CVE-2025-2669

Vulnerability Analysis

The weakness resides in how IBM Db2 on Cloud Pak for Data validates authentication tokens. The product fails to perform sufficient verification of token attributes before authorizing requested operations. This improper validation allows an authenticated privileged user to invoke operations and retrieve data that should be restricted by the authorization model. The flaw maps to CWE-295 (Improper Certificate Validation), indicating that trust decisions are made on insufficiently verified cryptographic material. Because the attack vector is network-based and requires no user interaction, an authenticated client can exercise the flaw directly against the Db2 service endpoints exposed by Cloud Pak for Data. The integrity impact is high, while confidentiality and availability impacts are low, reflecting the ability to alter or invoke privileged operations beyond the attacker's authority.

Root Cause

The service does not enforce complete token validation checks before binding a request to an identity or authority scope. Missing or weak verification steps such as signature, issuer, audience, or expiry checks allow tokens to be accepted in contexts where they should be rejected. This breaks the authority boundary that Cloud Pak for Data relies on to separate privileged operations.

Attack Vector

An attacker must already possess high-privilege credentials within the Cloud Pak for Data environment. With that foothold, the attacker submits crafted or reused tokens to Db2 endpoints over the network. The service accepts these tokens for operations outside the attacker's intended authorization scope. No social engineering or victim interaction is required.

No verified public exploit code is available. Refer to the IBM Support advisory for node 7277112 for vendor-supplied technical details.

Detection Methods for CVE-2025-2669

Indicators of Compromise

Db2 audit log entries showing privileged operations performed by accounts whose role assignments do not include those operations.
Repeated token presentation from a single principal targeting endpoints associated with tenants or schemas outside that principal's scope.
Access to sensitive tables, system catalogs, or administrative APIs that does not correlate with normal job function for the authenticated user.

Detection Strategies

Enable and centralize Db2 audit logging on Cloud Pak for Data, focusing on AUDIT, CHECKING, and SECMAINT categories to capture authorization decisions.
Correlate Cloud Pak for Data IAM token issuance events with downstream Db2 operations to identify tokens used across unexpected service boundaries.
Establish per-user baselines for schema, table, and administrative API access, and alert on deviations following an IBM Db2 authentication event.

Monitoring Recommendations

Stream Db2 audit logs and Cloud Pak for Data control-plane logs into a centralized analytics platform for correlation and retention.
Monitor for HTTP requests to Db2 REST endpoints carrying tokens with mismatched issuer, audience, or subject claims relative to the target tenant.
Track administrative operations such as grant changes, role modifications, and access to system catalog views by privileged accounts.

How to Mitigate CVE-2025-2669

Immediate Actions Required

Apply the fixes referenced in the IBM Support advisory for node 7277112 to all affected Db2 on Cloud Pak for Data and Db2 Warehouse on Cloud Pak for Data instances.
Inventory all Cloud Pak for Data deployments running versions 4.8, 5.0, 5.1, 5.2, or 5.3 and prioritize patching on internet-reachable clusters.
Review recent activity by privileged accounts for operations outside their normal authority scope and rotate any potentially exposed service credentials.

Patch Information

IBM has issued remediation guidance for affected versions 4.8, 5.0, 5.1, 5.2, and 5.3 through its support portal. Customers should consult the IBM Support page for node 7277112 to identify the specific interim fix or refresh required for each deployed release.

Workarounds

Restrict network exposure of Db2 on Cloud Pak for Data endpoints to trusted management networks until patches are applied.
Reduce the population of high-privilege accounts and enforce just-in-time elevation to limit the set of users who can exercise the flaw.
Shorten token lifetimes and require re-authentication for sensitive administrative operations to constrain the window of misuse.

bash

# Configuration example: tighten Db2 audit policy on Cloud Pak for Data
db2 "CREATE AUDIT POLICY TOKEN_ABUSE_POLICY \
     CATEGORIES AUDIT STATUS BOTH, \
                CHECKING STATUS BOTH, \
                SECMAINT STATUS BOTH, \
                SYSADMIN STATUS BOTH \
     ERROR TYPE AUDIT"
db2 "AUDIT SYSADMIN, DBADM USING POLICY TOKEN_ABUSE_POLICY"
db2 "COMMIT"