CVE-2026-1990 in oatpp
Summary
by MITRE • 02/06/2026
A security vulnerability has been detected in oatpp up to 1.3.1. This impacts the function oatpp::data::type::ObjectWrapper::ObjectWrapper of the file src/oatpp/data/type/Type.hpp. The manipulation leads to null pointer dereference. Local access is required to approach this attack. The exploit has been disclosed publicly and may be used. The project was informed of the problem early through an issue report but has not responded yet.
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Analysis
by VulDB Data Team • 02/07/2026
The vulnerability identified as CVE-2026-1990 represents a critical null pointer dereference flaw within the oatpp framework version 1.3.1 and earlier. This issue manifests in the oatpp::data::type::ObjectWrapper::ObjectWrapper function located in the src/oatpp/data/type/Type.hpp file, where improper handling of object wrapper initialization creates conditions that can lead to application crashes or potential exploitation. The vulnerability specifically affects the framework's type system implementation, which is fundamental to how oatpp processes and manages data objects within its web application framework. Given that this is a local privilege escalation vector, attackers must first gain local system access to exploit the vulnerability, though the public disclosure of exploitation techniques significantly increases the risk to systems running affected versions. The vulnerability's impact extends beyond simple application instability as null pointer dereferences can potentially be leveraged to execute arbitrary code or cause denial of service conditions when the application processes malformed data objects.
The technical implementation of this flaw stems from inadequate input validation within the ObjectWrapper constructor, where the function fails to properly initialize or validate pointer references before attempting to dereference them. This type of vulnerability aligns with CWE-476, which specifically addresses null pointer dereference conditions in software implementations. The flaw demonstrates poor defensive programming practices where the code assumes certain pointer values will always be valid without proper null checks or initialization verification. When the ObjectWrapper function encounters an uninitialized or improperly constructed object reference, the subsequent dereference operation results in a segmentation fault or similar memory access violation that terminates the application process. The issue is particularly concerning in web applications that rely heavily on oatpp's data type handling, as the vulnerability can be triggered through normal data processing operations when malformed or unexpected object structures are encountered.
From an operational perspective, this vulnerability presents a significant risk to systems that utilize oatpp framework versions prior to 1.3.2, particularly in environments where local access is possible or where attackers may have already established a foothold through other means. The public disclosure of exploit techniques means that threat actors can readily develop automated tools to target vulnerable systems, making this vulnerability particularly dangerous in production environments. The local access requirement does not provide sufficient protection as attackers who have already compromised a system or gained local privileges can leverage this flaw to escalate their privileges or maintain persistent access. Organizations running affected oatpp versions should consider the potential for privilege escalation attacks that could allow attackers to gain elevated system permissions or access to sensitive data processed through the framework. The vulnerability's impact on application availability is severe, as even a single exploitation attempt can cause service disruption and require system restarts to restore normal operations.
The recommended mitigation strategy for CVE-2026-1990 involves immediate upgrade to oatpp version 1.3.2 or later, which contains the necessary patches to address the null pointer dereference condition in the ObjectWrapper implementation. Organizations should also implement runtime monitoring to detect potential exploitation attempts and establish incident response procedures for handling such vulnerabilities. Additional defensive measures include implementing proper input validation at application boundaries and ensuring that all object initialization follows secure coding practices to prevent similar issues from occurring in custom code that interfaces with oatpp components. Security teams should also consider deploying network segmentation controls to limit local access privileges and implement regular vulnerability scanning to identify other potential issues within the application stack. The vulnerability demonstrates the importance of maintaining up-to-date software components and highlights the risks associated with delayed patch management, particularly for frameworks that handle core application data processing functions. Organizations should also review their application logs for signs of exploitation attempts and implement proper access controls to limit the potential impact of local privilege escalation attacks. This vulnerability aligns with ATT&CK technique T1068 which covers local privilege escalation and T1499 which addresses endpoint denial of service, making it a critical concern for both operational security and compliance requirements.