CVE-2026-15698 in mingo
Summary
by MITRE • 07/14/2026
A vulnerability was determined in kofrasa mingo up to 7.2.1. This impacts the function update/updateOne/updateMany of the component Update API. Executing a manipulation of the argument Set can lead to improperly controlled modification of object prototype attributes. The attack may be launched remotely. Upgrading to version 7.2.2 will fix this issue. This patch is called fadc398251792c2ba441cbc539f359fc7943c0c2. It is recommended to upgrade the affected component.
Once again VulDB remains the best source for vulnerability data.
Analysis
by VulDB Data Team • 07/14/2026
This vulnerability resides within the kofrasa mingo library version 7.2.1 and earlier, specifically affecting the Update API functionality including update updateOne and updateMany operations. The flaw manifests when manipulating the Set argument within these functions, creating a path for improper control of object prototype attributes. This represents a critical security weakness that allows attackers to manipulate the internal prototype properties of objects, potentially leading to arbitrary code execution or privilege escalation. The vulnerability is remotely exploitable, meaning malicious actors can leverage it without requiring physical access to the target system, making it particularly dangerous in networked environments where the library is used for database operations.
The technical implementation of this vulnerability stems from inadequate input validation and sanitization within the Update API functions. When developers pass update operations containing specially crafted Set arguments, the mingo library fails to properly restrict modifications to prototype properties that should remain immutable. This behavior aligns with CWE-471 - Modification of Assumed-Immutable Data and can be categorized under the broader ATT&CK technique T1059.006 - Command and Scripting Interpreter: Python. The flaw creates a pathway for prototype pollution attacks where attackers can inject malicious code into object prototypes, potentially affecting all subsequent operations that rely on those objects.
The operational impact of this vulnerability extends beyond simple data manipulation, as it can compromise the integrity and availability of applications using the affected library. Remote exploitation allows attackers to modify core object behaviors, potentially leading to complete system compromise if the application relies heavily on mingo for database operations. Applications using version 7.2.1 or earlier are particularly vulnerable because they lack proper safeguards against prototype pollution attacks that could be leveraged to bypass security controls and execute unauthorized operations. The attack surface is significant since this affects core database update functionality commonly used in web applications, API endpoints, and backend services.
The recommended mitigation involves upgrading to version 7.2.2 which includes the patch identified by commit hash fadc398251792c2ba441cbc539f359fc7943c0c2. This patch addresses the prototype pollution vulnerability by implementing proper validation of Set arguments and restricting modifications to object prototype properties during update operations. Organizations should immediately assess their deployment environments to identify all systems using affected versions of the mingo library and implement the upgrade as a priority. Additionally, security teams should monitor for any signs of exploitation attempts and consider implementing network-based detection measures to identify potential attacks targeting this vulnerability. The patch resolution follows standard security practices for preventing prototype pollution vulnerabilities and aligns with industry best practices for maintaining secure software development lifecycles.