Privilege escalation in Java-Json-Tools Json-Patch
CVE-2026-86512
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L.
EPSS exploit prediction
EPSS: 0.004 (29.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 29th percentile — 29.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.004 · change: +0.002
Affected products
- Java-Json-Tools Json-Patch — versions 1.0, 1.1, 1.10
Weakness classification (CWE)
References
- vuldb.com/vuln/399666 (technical-description, vdb-entry)
- vuldb.com/vuln/399666/cti (signature, permissions-required)
- vuldb.com/cve/CVE-2026-86512 (third-party-advisory)
- vuldb.com/submit/908391 (third-party-advisory)
- github.com/java-json-tools/json-patch/issues/170 (issue-tracking, exploit, patch)
- github.com/java-json-tools/json-patch/ (product, patch)
Frequently asked questions
- What is CVE-2026-86512?
- CVE-2026-86512 is a medium-severity vulnerability in Java-Json-Tools Json-Patch, classified under Incorrect Privilege Assignment. CVSS score: 6.3/10. Published 2026-09-08.
- How severe is CVE-2026-86512?
- Medium severity. CVSS v3 base score is 6.3 out of 10.