CVE-2026-4742 in liteide
Summary
by MITRE • 03/24/2026
Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling') vulnerability in visualfc liteide (liteidex/src/3rdparty/qjsonrpc/src/http-parser modules). This vulnerability is associated with program files http_parser.C.
This issue affects liteide: before x38.4.
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Analysis
by VulDB Data Team • 03/28/2026
The CVE-2026-4742 vulnerability represents a critical HTTP request smuggling flaw within the visualfc liteide development environment, specifically within the qjsonrpc module's http-parser component. This vulnerability stems from inconsistent interpretation of HTTP requests and responses, creating opportunities for attackers to manipulate HTTP communication between clients and servers. The issue is particularly concerning as it affects liteide versions prior to x38.4, indicating a widespread exposure across multiple releases of this popular Go programming environment. The vulnerability manifests in the http_parser.C file where HTTP request parsing logic fails to properly handle ambiguous or malformed HTTP requests, leading to potential request confusion and response splitting attacks.
The technical root cause of this vulnerability aligns with CWE-444, which specifically addresses inconsistent interpretation of HTTP requests and responses. The flaw occurs when the HTTP parser encounters requests that contain multiple Content-Length headers, transfer encoding specifications, or other ambiguous HTTP constructs that could be interpreted differently by various HTTP implementations. This inconsistency allows attackers to inject malicious requests that appear legitimate to the client but are interpreted differently by the server, potentially enabling attacks such as cache poisoning, session hijacking, or cross-site scripting exploitation. The vulnerability specifically impacts the qjsonrpc module's HTTP handling capabilities, which is crucial for liteide's remote debugging and development tools functionality.
The operational impact of this vulnerability extends beyond simple HTTP parsing issues, as it compromises the integrity of network communications within the liteide development environment. Developers using affected versions may unknowingly transmit sensitive information through manipulated HTTP requests that could be intercepted or manipulated by attackers. The vulnerability affects both the client-side HTTP request processing and server-side response handling, creating a potential attack surface for man-in-the-middle scenarios where attackers can inject malicious content into HTTP responses. Given that liteide is widely used for Go development, this vulnerability could expose developers to risks during remote debugging sessions, API testing, or when connecting to development servers through the integrated HTTP client functionality.
Mitigation strategies for this vulnerability should focus on immediate version upgrades to liteide x38.4 or later, which contain the necessary patches to address the HTTP parsing inconsistencies. Organizations should also implement network monitoring to detect anomalous HTTP traffic patterns that might indicate exploitation attempts. The fix typically involves implementing stricter HTTP request validation, ensuring proper handling of Content-Length headers, and applying consistent interpretation rules for HTTP message boundaries. Additionally, security teams should consider implementing HTTP request filtering mechanisms and conducting regular security assessments of development environments to prevent similar vulnerabilities from emerging in other components. This vulnerability demonstrates the importance of robust HTTP protocol implementation in development tools and highlights the need for comprehensive security testing of network communication components in integrated development environments. The ATT&CK framework categorizes this vulnerability under T1190 - Exploit Public-Facing Application, as it represents a weakness in a publicly accessible development tool that could be exploited to compromise developer environments and potentially affect deployed applications.