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CVE-2026-17182 is an authentication bypass vulnerability affecting IBM Db2 Mirror for i versions 7.4, 7.5, and 7.6. The flaw stems from improper validation of request URI path segments, allowing a remote, unauthenticated attacker to craft a malicious request that bypasses the login process entirely. By sending a specifically manipulated path, an attacker can skip authentication and gain unauthorized access to the application. This grants them the ability to view and alter sensitive information. The vulnerability is particularly dangerous because it requires no password or user interaction, making it highly automatable. The Db2 Mirror for i GUI operates with high-level system privileges to manage synchronization between two IBM i systems, meaning a successful compromise can give an attacker the same extensive reach. This flaw is part of a larger set of 18 vulnerabilities patched by IBM, with CVE-2026-17186 (a remote code execution flaw) being the most severe at a CVSS score of 9.9. However, CVE-2026-17182 itself is critical as it provides the initial access vector for further attacks. Exploitation could lead to data mirroring interruptions, business downtime, and exposure of sensitive data, posing a severe risk to industries like finance, retail, and logistics that rely on high-availability systems. As of the publication date, no public proof-of-concept or active exploitation has been confirmed, but the risk remains high. Administrators are urged to apply the available patches immediately.
DailyCVE Form:
Platform: ……. IBM Db2 Mirror for i
Version: …….. 7.4, 7.5, 7.6
Vulnerability :…… Authentication Bypass
Severity: ……. Critical
date: ………. August 14, 2026
Prediction: …… Patched (July 22, 2026)
What Undercode Say:
Analytics show the vulnerability allows unauthenticated remote attackers to bypass security restrictions by manipulating URI paths. The attack vector is network-based, requires low complexity, and no privileges or user interaction. The CVSS score is not explicitly provided for this specific CVE, but associated flaws like CVE-2026-17186 have a CVSS score of 9.9. The flaw is categorized under CWE-20 (Improper Input Validation).
The following bash command can be used to check the installed version of IBM Db2 Mirror for i:
Check IBM i OS version dspsysval SYSLEVEL Check Db2 Mirror for i PTF group level DSPPTF LICPGM(5770SS1)
To test for the vulnerability (Educational Purposes only), a crafted HTTP request can be sent to the vulnerable endpoint:
curl -k -X GET "https://<target-ip>:<port>/path/..;/admin" -H "User-Agent: Mozilla/5.0"
Exploit: (Educational Purposes!)
- Identify Target: Scan for IBM Db2 Mirror for i instances on versions 7.4, 7.5, or 7.6.
- Craft Request: Construct a URI with path traversal sequences (e.g.,
/..;/) to bypass authentication checks. - Send Request: Use tools like `curl` or Burp Suite to send the crafted request to the target.
- Gain Access: If vulnerable, the server will grant access to restricted resources without valid credentials.
Protection:
- Apply Patches: Immediately install the PTFs provided by IBM. The specific PTFs are SJ10947 for version 7.4, SJ10961 for 7.5, and SJ10948 for 7.6. The fix is also available via SJ01966.
- Restart Service: After applying the fix, restart the Db2 Mirror `QMRDBECTLR` job to activate the patch.
- Network Segmentation: Restrict network access to the Db2 Mirror GUI to only trusted management networks.
- Monitor Logs: Actively monitor for suspicious URI patterns or unauthorized access attempts.
Impact:
Successful exploitation allows a remote attacker to bypass authentication and obtain or alter sensitive information. This can lead to data leakage, data corruption, and disruption of high-availability mirroring services. Given the critical role of Db2 Mirror for i in synchronizing systems for failover, an attack could prevent proper failover during outages, resulting in significant business downtime and financial loss.
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Sources:
Reported By: nvd.nist.gov
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