CVE-2026-12749 in Cloud Pak for Business Automation
Summary
by MITRE • 09/15/2026
IBM Cloud Pak for Business Automation is vulnerable to stored cross-site scripting. This vulnerability allows an authenticated user to embed arbitrary JavaScript code in the Web UI thus altering the intended functionality potentially leading to credentials disclosure within a trusted session.
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Analysis
by VulDB Data Team • 09/15/2026
The IBM Cloud Pak for Business Automation platform contains a critical security flaw classified as a Stored Cross-Site Scripting (XSS) vulnerability, specifically identified under CWE-79. This weakness arises from insufficient validation and sanitization of user-supplied input before it is processed by the application's backend systems. Unlike reflected XSS attacks where malicious scripts are executed immediately within a victim's browser session through crafted links, this stored variant persists on the target server. The vulnerability allows an authenticated attacker to inject arbitrary JavaScript code into data fields that are subsequently rendered in the Web UI without proper encoding or escaping mechanisms. This persistence means that every time a legitimate user accesses the affected page or feature containing the malicious payload, their browser will execute the embedded script within the context of the application's domain.
From a technical perspective, this flaw represents a failure to implement secure coding practices regarding output handling and input validation. The application accepts untrusted data from authenticated users and stores it in persistent storage such as a database or file system without adequately neutralizing special characters that have meaning in HTML or JavaScript contexts. When the web server later retrieves this stored content to display it to other users, the browser interprets the injected script tags not as plain text but as executable code. This behavior violates the principle of least privilege and trust boundaries within the application architecture, allowing a lower-privileged user to effectively escalate their influence over the client-side environment by manipulating how data is rendered in subsequent sessions.
The operational impact of this vulnerability is severe due to its potential for widespread exploitation against multiple users rather than just the attacker who planted the payload. Because the script executes in the context of trusted sites, it inherits all privileges associated with that site, including access to cookies, local storage, and session tokens. An adversary can leverage this capability to perform credential harvesting by stealing sensitive authentication data from active sessions of other administrators or users within the organization. Furthermore, the attacker could alter the intended functionality of the Web UI, potentially redirecting users to phishing sites, defacing application interfaces, or performing unauthorized actions on behalf of victims without their knowledge. This compromises the confidentiality and integrity aspects of the CIA triad for any user interacting with the compromised components of IBM Cloud Pak for Business Automation.
In terms of threat modeling, this vulnerability aligns with ATT&CK technique T1059.007, which covers JavaScript execution as a method for client-side code injection. The attack vector typically involves an authenticated user submitting malicious content through standard input forms or API endpoints that feed into the vulnerable display logic. Once stored, the payload remains dormant until triggered by another user's visit to the affected page, creating a chain of compromise that can lead to significant data breaches and operational disruption within enterprise environments relying on this automation platform for critical business processes.
To mitigate this risk, immediate remediation efforts should focus on implementing robust input validation and output encoding strategies across all entry points where user data is accepted. Developers must ensure that any special characters are properly escaped or encoded before being rendered in HTML contexts to prevent the browser from interpreting them as executable code. Additionally, deploying a Content Security Policy (CSP) can provide an additional layer of defense by restricting the sources from which scripts can be loaded and executed, thereby limiting the impact even if some injection attempts succeed. Regular security audits, static application security testing (SAST), and dynamic application security testing (DAST) should also be integrated into the development lifecycle to detect such flaws early. Users running affected versions of IBM Cloud Pak for Business Automation are advised to apply the latest vendor-provided patches or updates that address this specific vulnerability as soon as possible to restore secure operation and protect against potential credential theft and unauthorized access.