CVE-2026-102671 in Joyland
Summary
by MITRE • 10/01/2026
The Joyland AI app accepts invalid SSL certificates in the invisible advertisement WebView by default.
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Analysis
by VulDB Data Team • 10/01/2026
The vulnerability identified within the Joyland AI application involves a critical misconfiguration in its handling of Transport Layer Security (TLS) connections, specifically affecting the internal web view component used for displaying advertisements. By accepting invalid or self-signed SSL certificates without validation, the application fails to establish a secure and authenticated channel with remote servers hosting ad content. This behavior represents a fundamental breakdown in cryptographic verification, allowing any entity capable of intercepting network traffic between the device and the advertisement server to manipulate the data stream without detection. The flaw is particularly concerning because it occurs within an invisible web view, meaning users are unaware that their interactions or the application's background processes are communicating over an unencrypted or falsely secured link.
From a technical perspective, this issue stems from improper implementation of certificate pinning or trust manager configuration in the Android WebView component. In standard secure development practices, applications must validate server certificates against a trusted root authority to ensure they are connecting to legitimate endpoints. By disabling these checks by default for ad-related traffic, the application creates an open door for man-in-the-middle attacks. An attacker positioned on the same network or capable of DNS spoofing can present a fraudulent certificate that matches the domain but lacks valid chain-of-trust verification. Since the app accepts this invalid certificate, it proceeds to establish communication as if the connection were secure, thereby exposing sensitive data transmitted during ad loading and interaction phases to eavesdropping and modification.
The operational impact of this vulnerability is significant, primarily revolving around confidentiality and integrity risks. Ad networks often transmit user identifiers, device information, session tokens, or behavioral analytics data alongside creative content. If an attacker intercepts these communications due to the lack of certificate validation, they can harvest personally identifiable information (PII) and usage patterns for malicious purposes such as profiling, targeted phishing, or identity theft. Furthermore, because the connection is not authenticated, attackers can inject malicious scripts, malware, or deceptive advertisements into the ad stream served by the compromised server. This could lead to drive-by download attacks where users inadvertently install harmful software simply by having the app load a manipulated advertisement in the background.
This vulnerability aligns with CWE-295 Improper Certificate Validation and CWE-319 Cleartext Transmission of Sensitive Information, as it involves both the failure to verify identity and the subsequent exposure of data over an insecure channel. In terms of offensive security frameworks, this flaw facilitates MITM attacks categorized under ATT&CK technique T1072 Software Deployment Tools or more specifically related to network sniffing techniques like T1048 Enhanced Encryption if the attacker exploits the lack of validation to decrypt traffic that would otherwise be protected by valid certificates. The risk is exacerbated in mobile environments where users frequently connect to untrusted public Wi-Fi networks, making them highly susceptible to interception attacks when such apps are active.
To mitigate this vulnerability, developers must enforce strict certificate pinning or implement robust trust manager configurations that reject any certificate not signed by a recognized Certificate Authority. It is essential to disable the ability for web views to accept invalid certificates entirely rather than providing it as an optional feature. Additionally, implementing HTTP Strict Transport Security (HSTS) headers where applicable and ensuring that all network requests are forced over HTTPS with valid validation will close this attack vector. Regular security audits focusing on third-party SDK integrations, such as ad networks, are crucial to ensure they do not introduce similar weaknesses into the application's trust model.