CVE-2026-66832 in Mira Mira Android App
Summary
by MITRE • 08/12/2026
When the Mira Android app opens in-app WebView content (e.g., shop redirect flows), the user's live session token is appended to the URL as a query string parameter, and a persistent user identifier is included in the WebView's User-Agent header. Both are then transmitted to third-party web properties, referrer logs, and any JavaScript running in the WebView context.
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Analysis
by VulDB Data Team • 08/12/2026
This vulnerability represents a critical information disclosure flaw that occurs within the Mira Android application's handling of in-app web content navigation. The technical implementation fails to properly sanitize or isolate sensitive session data when transitioning from native application components to webview contexts, creating an attack surface where authentication tokens and user identifiers become exposed through multiple vectors. The flaw manifests specifically during shop redirect flows where the application naively appends session tokens as URL query parameters without considering the security implications of exposing such credentials in web access logs or referrer headers.
The vulnerability directly relates to CWE-200, Information Exposure, and CWE-352, Cross-Site Request Forgery, while also demonstrating characteristics consistent with CWE-1274, Improper Neutralization of Special Elements used in a Web Page. The persistent user identifier embedded within the WebView's User-Agent header creates an additional attack vector that can be leveraged for user tracking and correlation across different domains. From an operational perspective, this exposure allows attackers who gain access to referrer logs, third-party analytics services, or intercept network traffic to extract valid session tokens that could enable unauthorized access to user accounts.
The impact extends beyond simple credential leakage as the exposed session tokens can be used for account takeover attacks, session hijacking, and privilege escalation within the application's ecosystem. The persistent identifier in User-Agent headers provides additional correlation capabilities that attackers can use for behavioral analysis and targeted attacks against specific users. Network traffic interception, third-party logging services, and server-side access logs all become potential vectors for exploitation where these sensitive parameters are transmitted without proper security controls.
Mitigation strategies should include implementing a comprehensive token management approach that prevents automatic parameter injection into URLs during webview navigation, utilizing secure headers to prevent referrer leakage, and establishing proper input validation for webview content. The application should implement a secure session handling mechanism that employs techniques such as token rotation, secure cookie attributes, and proper CORS policies to prevent unauthorized access to sensitive data. Additionally, the implementation should leverage platform-specific security features like WebView security configurations and ensure that all third-party integrations properly handle sensitive information through secure communication channels. Organizations should also consider implementing monitoring solutions to detect anomalous access patterns that might indicate exploitation of this vulnerability.
This type of vulnerability aligns with ATT&CK technique T1531, Account Access Removal, and T1071.004, Application Layer Protocol: DNS, as attackers can leverage the exposed tokens to establish persistent unauthorized access to user accounts. The implementation should also consider the principles outlined in NIST SP 800-53, particularly security controls related to access control and information flow protection to prevent unauthorized information disclosure through webview contexts. Regular security assessments and penetration testing should be conducted to identify similar vulnerabilities in other application components that might expose sensitive session data through improper parameter handling or insecure communication patterns.