CVE-2026-51297 in SQLite
Summary
by MITRE • 07/27/2026
sqlite 3.41 has a use-after-free vulnerability in the JSON parsing logic. Remote adversaries can craft malicious JSON payload to trigger memory free followed by illegal memory access, which may lead to arbitrary code execution, sensitive information leakage and service denial.
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Analysis
by VulDB Data Team • 07/27/2026
The vulnerability under discussion represents a critical use-after-free condition within SQLite version 3.41's JSON parsing implementation that fundamentally compromises the database engine's memory safety guarantees. This flaw resides in the core processing logic responsible for handling structured data formats, making it particularly dangerous given SQLite's widespread adoption across applications ranging from mobile devices to web backends. The vulnerability is classified as a use-after-free issue which occurs when a program continues to reference memory that has already been freed, creating potential attack vectors through memory corruption.
The technical exploitation mechanism involves crafting specifically formatted JSON payloads that trigger the vulnerable parsing code path within SQLite's internal JSON handling routines. When such malformed input is processed, the parser executes a memory deallocation operation followed by subsequent access to the freed memory region, creating an opportunity for attackers to manipulate the memory layout or inject malicious code into the process address space. This particular implementation flaw demonstrates poor memory management practices where object lifetimes are not properly tracked during JSON parsing operations, allowing for illegal memory access patterns that violate fundamental security principles.
From an operational perspective, this vulnerability presents a severe threat landscape that encompasses multiple attack vectors and potential impacts. Remote adversaries can leverage this weakness to execute arbitrary code within the context of the SQLite process, potentially escalating privileges or gaining unauthorized access to sensitive data stored in database files. The memory corruption aspects also enable information disclosure attacks where attackers might extract sensitive data from adjacent memory regions, while service denial capabilities allow for complete disruption of database operations through controlled crashes or resource exhaustion attacks. The impact is particularly severe given that many applications rely on SQLite for critical data storage functions.
The vulnerability aligns with several established security frameworks and classifications including CWE-416 which specifically addresses use-after-free conditions in software implementations. From an attack methodology standpoint, this flaw maps to multiple ATT&CK techniques including execution through code injection and privilege escalation via memory corruption attacks. The remote exploitability aspect means that adversaries can target vulnerable systems without requiring local access or physical presence, making it particularly dangerous for web applications and network services that process external JSON data inputs.
Mitigation strategies should prioritize immediate patch deployment as the primary defense mechanism, given that SQLite 3.41 contains fixes specifically addressing this vulnerability in subsequent releases. Organizations must implement comprehensive input validation measures to sanitize all JSON data before processing, though this approach remains insufficient as a standalone solution due to the underlying memory corruption nature. Network segmentation and access controls should be implemented to limit exposure of vulnerable systems to untrusted JSON inputs, while application-level monitoring can help detect anomalous behavior indicative of exploitation attempts. Additionally, regular security assessments and penetration testing focused on database processing components can help identify similar vulnerabilities in custom applications that may utilize SQLite or other embedded database engines.