IBM Db2 Mirror for i Authentication Bypass Vulnerability
First seen Aug 15, 2026 · Updated Aug 15, 2026 · CVSS 9.8
CVE-2026-17182 is a critical authentication bypass vulnerability in IBM Db2 Mirror for i affecting versions 7.4, 7.5, and 7.6, allowing remote attackers to bypass authentication controls due to improper validation of request URI path segments. Exploitation could result in unauthorized access, disclosure, or alteration of sensitive database information without requiring credentials. With a CVSS score of 9.8, this vulnerability poses a severe risk to organizations running affected Db2 Mirror deployments.
Technical Analysis
The vulnerability stems from improper validation of URI path segments in request handling logic within Db2 Mirror for i, enabling an unauthenticated remote attacker to craft malicious requests that circumvent standard authentication checks. This class of flaw typically involves path traversal or parsing logic errors that allow access to protected endpoints or administrative functions without valid session tokens or credentials. Successful exploitation grants attackers the ability to read or modify sensitive data replicated between mirrored Db2 instances, potentially compromising data integrity and confidentiality across high-availability database clusters. Given the network-based, low-complexity attack vector implied by the 9.8 CVSS score, exposed Db2 Mirror for i management interfaces should be considered high-priority targets for patching. If AI agent systems or RAG pipelines rely on Db2 Mirror for i as a backend data store or retrieval source, this vulnerability could allow attackers to poison or exfiltrate data feeding into agent decision-making, making it agent-relevant for organizations with such integrations.
Affected Systems
IBM Db2 Mirror for i versions 7.4, 7.5, and 7.6 running on IBM i (AS/400) platforms, particularly instances with exposed Db2 Mirror replication or management interfaces accessible over the network.
Indicators of Compromise
- No public IOCs available at this time; monitor IBM i system logs for anomalous unauthenticated requests to Db2 Mirror endpoints with unusual or malformed URI path segments.
Remediation Steps
- 1
Apply IBM Security Patch
Update Db2 Mirror for i to the fixed version as specified in IBM's official security bulletin for CVE-2026-17182.
- 2
Restrict Network Exposure
Limit network access to Db2 Mirror management and replication interfaces to trusted internal networks only, using firewalls or network segmentation.
- 3
Audit Access Logs
Review IBM i system and Db2 Mirror logs for signs of unauthorized access attempts or unusual URI path patterns prior to patch deployment.
- 4
Enable Enhanced Authentication Controls
Where supported, implement additional authentication layers such as VPN or multi-factor access gateways in front of Db2 Mirror services.
- 5
Validate Data Integrity
After patching, verify integrity of mirrored databases to ensure no unauthorized alterations occurred prior to remediation.
CVE / Advisory IDs
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