Vulnerability · Published Sep 8, 2026 · Assigned by VulDB

CVE-2026-86512java-json-tools json-patch Copy Move Operations CopyOperation.java MoveOperation.apply access control

Medium 6.3

In plain English

A medium-severity improper access control in json-patch from java-json-tools. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 31% of all known vulnerabilities).

Severity (CVSS 3.1)6.3Medium

Exploit odds (30 days)0.4%top 69.4% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

A vulnerability was identified in java-json-tools json-patch up to 1.13. This affects the function CopyOperation.apply/MoveOperation.apply of the file src/main/java/com/github/fge/jsonpatch/CopyOperation.java of the component Copy Move Operations. The manipulation leads to improper access controls. Remote exploitation of the attack is possible. The exploit is publicly available and might be used. The project was informed of the problem early through an issue report but has not responded yet.

Affected products (as reported)

Vendor	Product	Versions
java-json-tools	json-patch	1.01.11.21.31.41.51.61.7

Weakness: CWE-284, CWE-266 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R

References

VDB-399666 | java-json-tools json-patch Copy Move Operations CopyOperation.java MoveOperation.apply access control vdb-entry, technical-description
VDB-399666 | CTI Indicators (IOB, IOC, TTP, IOA) signature, permissions-required
CVE-2026-86512 | CVE Analysis and Report third-party-advisory
Submit #908391 | java-json-tools json-patch 1.13 Broken Access Control third-party-advisory
https://github.com/java-json-tools/json-patch/issues/170 exploit, issue-tracking, patch
https://github.com/java-json-tools/json-patch/ patch, product