CVE-2026-57104 in Azure Storage Explorer
Summary
by MITRE • 08/11/2026
Improper neutralization of input during web page generation ('cross-site scripting') in Azure Storage Explorer allows an unauthorized attacker to elevate privileges over a network.
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Analysis
by VulDB Data Team • 08/12/2026
Cross-site scripting vulnerabilities in azure storage explorer represent a critical security flaw that enables unauthorized attackers to execute malicious scripts within the context of legitimate user sessions. this vulnerability falls under the common weakness enumeration category 79 which specifically addresses improper neutralization of input during web page generation. the flaw occurs when the application fails to properly sanitize user-supplied data before incorporating it into dynamically generated web content, creating an attack vector where malicious payloads can be injected and executed by other users.
the technical implementation of this vulnerability stems from inadequate input validation and output encoding mechanisms within the azure storage explorer web interface. when users interact with storage containers or blobs through the web-based management console, any unvalidated data entered into form fields or URL parameters may be directly embedded into html responses without proper sanitization. this creates an environment where attackers can craft malicious payloads that exploit the browser's trust in the application context to execute arbitrary javascript code.
operational impact of this vulnerability extends beyond simple script execution as it provides attackers with potential privilege escalation capabilities within the azure storage ecosystem. once an attacker successfully injects malicious scripts, they can manipulate user sessions, access restricted storage resources, modify data, or even escalate privileges to perform operations typically restricted to administrators. the attack surface becomes particularly dangerous when considering that azure storage explorer interfaces often contain sensitive data and administrative controls that could be compromised through this vector.
the exploitation process typically involves crafting specially designed input strings that contain javascript payloads or html tags which are then rendered in the victim's browser session. these payloads can include persistent cross-site scripting techniques such as stored xss where malicious code is permanently stored on the server and executed whenever users view affected content, or reflected xss where the malicious payload is included in urls or form submissions that directly influence page generation.
mitigation strategies should focus on implementing robust input validation and output encoding mechanisms throughout the application stack. developers must ensure all user-supplied data undergoes proper sanitization before being incorporated into web pages, utilizing context-aware encoding techniques for different output contexts such as html attributes, javascript contexts, and css blocks. the implementation of content security policies can provide additional protection layers by restricting script execution and limiting the attack surface available to malicious actors.
comprehensive defense-in-depth approaches should include regular security testing including dynamic application security testing and manual penetration testing to identify potential injection points in web interfaces. implementing proper access controls and privilege separation within azure storage explorer environments can limit the impact of successful exploitation attempts. organizations should also consider deploying web application firewalls and monitoring solutions that can detect and block suspicious input patterns commonly associated with cross-site scripting attacks.
the vulnerability aligns with attack technique 1165 from the attack tactics and techniques framework which describes the use of cross-site scripting to gain access to user sessions and execute malicious code within trusted contexts. organizations using azure storage explorer must prioritize patch management and security updates while maintaining awareness of potential supply chain vulnerabilities that could be exploited through this type of injection flaw. regular security awareness training for administrators and developers can help prevent configuration issues that might exacerbate the impact of such vulnerabilities in production environments.