CVE-2026-17209 in Db2 Mirror for i
Summary
by MITRE • 08/14/2026
IBM Db2 Mirror for i 7.4, 7.5, and 7.6 could allow a remote authenticated attacker to execute arbitrary scripts due to cross-site scripting.
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Analysis
by VulDB Data Team • 08/14/2026
This vulnerability affects IBM Db2 Mirror for i versions 7.4, 7.5, and 7.6, presenting a significant security risk through cross-site scripting (XSS) exploitation. The flaw resides in the web-based administrative interface of the database mirroring solution, which fails to properly sanitize user input before rendering it within web pages. An authenticated attacker with access to the system can craft malicious payloads that get executed in the context of other users' browsers when they view affected pages. This represents a classic reflected XSS vulnerability where malicious scripts are injected through parameters or form fields that are not adequately validated or encoded.
The technical implementation of this vulnerability stems from insufficient input validation and output encoding mechanisms within the web application layer of Db2 Mirror for i. When user-supplied data is processed and displayed without proper sanitization, it creates an attack surface where malicious JavaScript code can be injected and subsequently executed by unsuspecting victims. The vulnerability specifically impacts the administrative console functionality that provides monitoring and management capabilities for database mirroring operations, making it particularly dangerous as it could potentially allow attackers to escalate privileges or access sensitive operational data.
From an operational impact perspective, this vulnerability enables remote authenticated attackers to perform a range of malicious activities including session hijacking, data exfiltration, and privilege escalation within the database environment. The attack requires only authentication credentials, which significantly lowers the barrier to exploitation compared to unauthenticated vulnerabilities. Once exploited, attackers could manipulate database mirroring configurations, potentially disrupting high availability operations or gaining unauthorized access to mirrored data repositories.
The vulnerability aligns with CWE-79, which specifically addresses cross-site scripting flaws in web applications, and maps to ATT&CK technique T1566 for initial access through malicious web content. Organizations should implement immediate mitigations including applying the latest security patches from IBM, implementing proper input validation at all user-facing interfaces, and configuring web application firewalls to detect and block suspicious script injections. Additionally, network segmentation and least privilege access controls should be enforced to limit potential damage from successful exploitation attempts.
Security monitoring should focus on detecting unusual administrative activities and anomalous traffic patterns in the web console components. Regular security assessments of web applications within database environments are essential to identify similar vulnerabilities that may exist in other components of the system infrastructure. The remediation process should include comprehensive code review of input handling mechanisms and validation procedures to ensure all user-supplied data is properly sanitized before processing or display, following established secure coding practices and OWASP top ten guidelines for preventing XSS vulnerabilities in web applications.
Organizations utilizing IBM Db2 Mirror for i systems should prioritize patch deployment as a critical security measure while simultaneously reviewing their overall web application security posture to identify potential similar weaknesses in other database management interfaces or administrative tools that may present comparable risks.