SQLite JSON Parsing Use-After-Free Vulnerability

Executive Summary

CVE-2026-51297 is a use-after-free vulnerability in SQLite version 3.41 affecting the JSON parsing module. When attacker-controlled JSON payloads are processed, the library deallocates a JsonParse heap object but fails to nullify the pointer. This allows the dangling pointer to be used in jsonBlobEdit(), causing out-of-bounds heap access. The flaw can be triggered by malformed JSON payloads, leading to service crashes, sensitive memory disclosure, and potential arbitrary code execution.

Useful 0 Not Useful 0

Detection Guidance

To detect this vulnerability, monitor for crashes or memory corruption in applications using SQLite's JSON functions. Check logs for malformed JSON parsing errors or unexpected service terminations. Use tools like AddressSanitizer or Valgrind to detect use-after-free issues during JSON processing.

Useful 0 Not Useful 0

Impact Analysis

This vulnerability can lead to denial of service, sensitive information leakage, and arbitrary code execution. Attackers can exploit it by sending malformed JSON payloads to applications using SQLite's JSON functions, potentially crashing services or stealing data. Exploitation requires only standard SQL execution rights with controllable JSON input.

Useful 0 Not Useful 0

Compliance Impact

This vulnerability could lead to sensitive information leakage due to memory corruption during JSON parsing, which may violate GDPR's data protection requirements for secure processing of personal data. For HIPAA, the arbitrary code execution potential could compromise protected health information systems if exploited.

Useful 0 Not Useful 0

Mitigation Strategies

Immediately upgrade SQLite to the latest patched version. If upgrading is not possible, disable JSON functions in SQLite or restrict JSON input processing. Apply input validation to sanitize JSON payloads before processing. Monitor for exploitation attempts in logs.

Useful 0 Not Useful 0