CVE-2026-86512: Improper Access Controls in java-json-tools json-patch
Description
CVE-2026-86512 is a medium severity vulnerability in the java-json-tools json-patch library up to version 1.13. It involves improper access controls in the CopyOperation.apply and MoveOperation.apply functions. The flaw allows remote exploitation without user interaction or privileges beyond low-level access. The vulnerability has a CVSS 4.0 base score of 5.3. The project has been informed but has not yet responded or issued a fix. Exploit code is publicly available.
CVSS v4.0
Score 5.3medium
Affected software
java-json-tools
json-patch
pkg:maven/com.github.java-json-tools/json-patchcpe:2.3:a:java-json-tools:json-patch:*:*:*:*:*:*:*:*Run on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability affects the java-json-tools json-patch library versions 1.0 through 1.13. It is caused by improper access controls in the CopyOperation.apply and MoveOperation.apply methods within the Copy Move Operations component. This flaw can be exploited remotely without user interaction or elevated privileges, potentially allowing unauthorized manipulation of JSON patch operations. The vulnerability was reported early to the project, but no official fix or response has been provided. Public exploit code exists, but there is no evidence of active exploitation in the wild.
Potential Impact
The vulnerability allows remote attackers with low privileges to bypass intended access controls in JSON patch copy and move operations, potentially leading to unauthorized data manipulation. The CVSS 4.0 score of 5.3 reflects a medium impact with low attack complexity and no user interaction required. There is no indication of privilege escalation or system compromise beyond the affected component.
Mitigation Recommendations
No official fix or patch is currently available as the vendor has not responded to the issue report. Users should monitor the project for updates and consider applying additional access controls or input validation around JSON patch operations as a temporary mitigation. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulDB
- Date Reserved
- 2026-09-07T19:06:36.411Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6a9f74f7acd9273b49d8b1d3
Added to database: 09/08/2026, 02:37:43 UTC
Last enriched: 09/16/2026, 02:33:34 UTC
Last updated: 10/21/2026, 13:22:16 UTC
Views: 72
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