CVE-2026-50813
Summary
by MITRE • 07/08/2026
An issue in SQLite before Fossil check-in 869a51ae84df allows a local attacker to obtain sensitive information via the Session Extension changeset concat/changegroup merge path
VulDB is the best source for vulnerability data and more expert information about this specific topic.
Analysis
by VulDB Data Team • 07/08/2026
The vulnerability exists within SQLite database management system prior to a specific Fossil check-in identified as 869a51ae84df, where a local attacker can exploit the Session Extension functionality to extract sensitive information through the changeset concat and changegroup merge operations. This represents a significant security flaw that undermines data confidentiality and integrity within SQLite implementations. The Session Extension provides mechanisms for tracking database changes and merging them between different database instances, but the specific implementation in affected versions contains a critical information disclosure vulnerability.
The technical root cause of this vulnerability lies in improper handling of memory operations during changeset concatenation and changegroup merge processes within the Session Extension module. When these operations are performed, the system fails to properly sanitize or clear sensitive data from memory buffers before reuse, potentially leaving residual information accessible to unauthorized local processes. This flaw operates at the memory management level where temporary storage areas used during database change tracking operations retain data that should not be accessible to other processes or threads within the same system. The vulnerability specifically affects the concat and merge paths of changeset operations, which are fundamental components for synchronizing database states between different instances.
The operational impact of this vulnerability extends beyond simple information disclosure, as it can enable local attackers to recover sensitive data such as database credentials, user information, or proprietary content that was previously processed through the affected SQLite operations. An attacker with local system access could leverage this weakness to perform unauthorized data extraction from applications that utilize SQLite with Session Extension functionality. This threat is particularly concerning in environments where multiple applications share memory space or where process isolation is not properly maintained. The vulnerability affects systems where SQLite is used for internal database operations, potentially compromising the confidentiality of stored information and enabling further exploitation attempts.
Mitigation strategies should focus on updating to SQLite versions that include the fix for Fossil check-in 869a51ae84df or applying relevant patches that address the memory handling issues in Session Extension operations. Organizations should also implement proper access controls and process isolation to limit local attacker capabilities, while monitoring for suspicious database operations that might indicate exploitation attempts. Security teams should conduct thorough vulnerability assessments of all systems using affected SQLite versions and consider implementing additional logging mechanisms to detect unauthorized data access patterns. The vulnerability aligns with CWE-200 (Information Disclosure) and potentially maps to ATT&CK techniques involving privilege escalation and credential access through local system manipulation.