Access Control Vulnerability in java-json-tools json-patch by GitHub
CVE-2026-86512

5.3MEDIUM

Key Information:

Vendor: Java-json-tools
Status: Json-patch
Vendor: CVE Published:; 8 September 2026

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👾 Exploit Exists🟡 Public PoC

What is CVE-2026-86512?

A security vulnerability has been discovered in the java-json-tools json-patch component, specifically in the Copy Move Operations feature. This flaw, found in the methods CopyOperation.apply and MoveOperation.apply, allows for improper access controls, potentially enabling unauthorized actions by malicious users. Remote exploitation is feasible, raising concerns over the integrity of the system. Although the issue was reported to the project maintainers, there has been no response or indication of a fix. It is crucial for users to be aware of this vulnerability, especially given the availability of public exploits.

Affected Version(s)

json-patch 1.0

json-patch 1.1

json-patch 1.2

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-86512 - Proof of Concept