CVE-2026-86513 in jackson-coreutils
Summary
by MITRE • 09/08/2026
A security flaw has been discovered in java-json-tools jackson-coreutils 2.0. This vulnerability affects the function TreePointer.tokensFromInput of the file src/main/java/com/github/fge/jackson/jsonpointer/TreePointer.java of the component JSON Pointer parser. The manipulation results in allocation of resources. The attack can be executed remotely. The exploit has been released to the public and may be used for attacks. 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 • 09/08/2026
The vulnerability identified within java-json-tools jackson-coreutils version 2.0 represents a significant resource management flaw located in the JSON Pointer parsing component, specifically affecting the TreePointer.tokensFromInput function found in src/main/java/com/github/fge/jackson/jsonpointer/TreePointer.java. This defect is classified as an improper allocation of resources that can lead to denial-of-service conditions when triggered by maliciously crafted input. The core issue stems from how the parser handles specific sequences or structures within JSON Pointer strings, potentially causing the application to enter a state where it continuously allocates memory or processing cycles without releasing them appropriately. This behavior aligns with Common Weakness Enumeration category CWE-400 which covers situations where resources are not properly constrained before consumption leading to resource exhaustion.
From an operational perspective, this vulnerability allows for remote exploitation by attackers who can send specially constructed JSON Pointer requests to a service utilizing the affected library. Since the flaw is triggered during the parsing phase of input data, it does not require authentication or complex setup procedures beyond having network access to the vulnerable endpoint. The availability of public exploits significantly lowers the barrier to entry for threat actors, enabling them to launch denial-of-service attacks against systems relying on this component. Such attacks can result in service unavailability, increased latency due to resource contention, and potential instability in downstream applications that depend on the JSON processing capabilities provided by jackson-coreutils.
The impact of this vulnerability extends beyond simple availability loss as it may also contribute to broader system degradation if multiple instances are targeted simultaneously or if the affected component is part of a critical microservice architecture. In environments where high throughput and low latency are required, such as financial trading platforms or real-time data processing systems, even brief periods of resource exhaustion can have severe consequences including transaction failures or data inconsistencies. Furthermore, because the project has not yet responded to early issue reports indicating this problem, organizations relying on version 2.0 remain exposed without an official patch available from the maintainers at this time.
To mitigate the risks associated with CVE details related to jackson-coreutils 2.0, immediate action is recommended for system administrators and developers. The primary mitigation strategy involves upgrading to a patched version of the library once one becomes available through official channels or community forks that have addressed the issue. In the interim, implementing input validation mechanisms at the network perimeter can help filter out malformed JSON Pointer strings before they reach the vulnerable parsing logic. Additionally, applying resource limits and timeouts within the application server hosting the affected component can help contain the impact of any successful exploitation attempts by preventing a single request from consuming excessive system resources. Monitoring tools should be configured to detect unusual spikes in memory usage or CPU consumption associated with JSON processing endpoints which may indicate an ongoing attack leveraging this vulnerability.
This incident highlights the importance of maintaining up-to-date dependencies and actively monitoring project repositories for security updates as indicated by ATT&CK techniques related to resource hijacking such as T1496 Resource Hijacking where attackers leverage compromised resources for their own purposes or simply cause disruption through exhaustion. Organizations should also consider adopting a software bill of materials approach to track component versions and ensure rapid response capabilities when new vulnerabilities are disclosed in widely used libraries like jackson-coreutils.