MongoDB: 14 Vulnerabilities Disclosed, GridFS & Server Impacted in 24h Window
A batch of 14 MongoDB vulnerabilities, including critical flaws in GridFS and the core server, were disclosed within a 24-hour window, impacting multiple language drivers.
Key findings
- 14 MongoDB vulnerabilities disclosed between Sep 10-11, 2026, impacting server and multiple language drivers.
- Multiple High-severity flaws in GridFS component allow query manipulation via malformed identifiers across C, C++, Java, Go, Ruby, Python, C#, Rust, PHP drivers.
- Core MongoDB Server affected by a High-severity race condition (CVE-2026-89099) leading to memory corruption.
- Other vulnerabilities include use-after-free in Java driver's encryption, buffer overflow in C driver authentication, and query logic issues in C# and Laravel integrations.
- The batch includes vulnerabilities with CVSSv3 scores up to 8.3, emphasizing the need for prompt patching.
On September 10-11, 2026, a batch of 14 vulnerabilities was disclosed across various MongoDB components and drivers, with a significant cluster affecting the GridFS component. These vulnerabilities, ranging in severity from Medium to High, were disclosed within a 24-hour window, highlighting a concentrated disclosure event by the MongoDB security team. The most critical issues stem from improper neutralization of special elements in data query logic, particularly within the GridFS component, impacting multiple language drivers including C, C++, Java, Go, Ruby, Python, C#, Rust, and PHP. These flaws could allow authenticated users to manipulate queries, potentially leading to unintended data access or application termination.
Several CVEs, including CVE-2026-88036, CVE-2026-88034, CVE-2026-88033, CVE-2026-88031, CVE-2026-88030, CVE-2026-88029, CVE-2026-88025, CVE-2026-88024, and CVE-2026-88023, share a common root cause: the GridFS component misinterpreting a caller-supplied structured file identifier as a query condition instead of a literal value. This vulnerability class, rated High with CVSSv3 scores up to 8.3, could be exploited by authenticated users with influence over the identifier.
Another notable vulnerability, CVE-2026-89099 (High, CVSSv3 7.5), affects the core MongoDB Server itself. It describes a race condition in the document value layer that can lead to memory corruption if concurrent server threads operate on the same internal memory without proper synchronization. This could be triggered by an authenticated user with ordinary read-write privileges.
Beyond GridFS and core server issues, other components and drivers are also impacted. CVE-2026-88032 (Medium, CVSSv3 5.9) is a use-after-free vulnerability in the reactive client-side encryption component of the MongoDB Java Driver, potentially leading to application crashes when an encrypted operation is cancelled. CVE-2026-88035 (Medium, CVSSv3 4.7) in the MongoDB C Driver involves a size check in client-side authentication that can wrap around, allowing an unusually large username to cause a buffer overflow and application termination. Additionally, CVE-2026-88026 (Medium, CVSSv3 6.5) in the MongoDB C# Driver's LINQ query translation component could allow an authenticated user to alter regular-expression predicates. Finally, CVE-2026-88022 (High, CVSSv3 7.7) impacts the MongoDB integration for Laravel, where an array supplied to an explicit equality filter in the where method can be misinterpreted as a query condition.
The disclosure of these 14 vulnerabilities within a short timeframe underscores the importance of timely patching and driver updates for MongoDB users. While specific exploitation details were not provided in the advisories, the nature of these flaws, particularly those affecting query logic and memory management, suggests potential for significant impact if exploited. Users are advised to consult MongoDB's official security advisories for specific version information and recommended updates to mitigate these risks. The breadth of affected drivers indicates a need for a comprehensive review of all MongoDB deployments.
This batch of vulnerabilities serves as a reminder for organizations to maintain vigilance regarding their database security, ensuring all components and integrated drivers are up-to-date to protect against potential data breaches and service disruptions. The coordinated disclosure suggests a proactive approach by MongoDB to address these issues, but prompt action from users remains critical.
The affected versions and specific patching information are detailed in MongoDB's security advisories. Users should refer to these advisories for precise guidance on updating their installations and drivers to secure versions. The range of affected components and drivers emphasizes the interconnectedness of the MongoDB ecosystem and the importance of a holistic security strategy.
This concentrated disclosure event highlights the ongoing efforts to identify and remediate security weaknesses within complex software systems like MongoDB. Staying informed about such disclosures and applying patches promptly is essential for maintaining a secure operational environment. The variety of vulnerabilities, from memory corruption to query injection, demonstrates the diverse threat landscape database systems face.
The timely release of patches and advisories for this batch of vulnerabilities allows users to address potential security gaps. It is crucial for administrators to prioritize these updates to prevent exploitation and maintain the integrity and confidentiality of their data. The coordinated nature of the disclosure aids security teams in understanding and responding to the threat landscape effectively.
MongoDB's commitment to security is evident in the rapid disclosure and provision of fixes for these issues. However, the responsibility ultimately lies with the users to implement these security measures. Regular security audits and a robust patch management process are key to safeguarding against the evolving threat of cyberattacks. The wide range of affected drivers necessitates a thorough review of all integration points.
The vulnerabilities disclosed span various aspects of MongoDB's functionality, from core server operations to specific driver implementations and integrations. This comprehensive approach to security reporting by MongoDB helps the community address a wide array of potential risks. Users should remain diligent in monitoring for future disclosures and updates.
The impact of these vulnerabilities varies, but many carry a high severity rating, indicating a significant potential risk to data confidentiality, integrity, and system availability. Prompt attention to patching and updating is therefore paramount for all users of MongoDB products and drivers. The coordinated disclosure across multiple drivers suggests a systemic review by MongoDB.