CVE-2026-86512

MEDIUMPre-NVD 6.36.3—
EchelonGraph scoreHIGH confidence

Score 6.3 from GitHub Security Advisory (severity: LOW) published 2026-09-08. a secondary CVSS source baseline 6.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this weekElevated
6.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.3Exploit: Elevated riskExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
6.3
EG Score
6.3(high)
EG Risk
44(Track)
EG Risk 44/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity63% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
11%
KEV
Not listed

Published

September 8, 2026

Last Modified

September 9, 2026

Advisory Details (2)

Auto-updated Sep 8, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic

GitHub - java-json-tools/json-patch: An RFC 6902 (JSON Patch) and reverse, plus RFC 7386 (JSON Merge Patch), implementation in Java using Jackson (2.2.x) · GitHub

https://github.com/java-json-tools/json-patch/
generic🟡 PoC Available

[Security] Unrestricted Copy/Move Operations Enable Intra-Document Data Exfiltration · Issue #170 · java-json-tools/json-patch · GitHub

https://github.com/java-json-tools/json-patch/issues/170

Vendor Advisories for CVE-2026-86512(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 19× in last 7d / 42× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-09-19 21:49 UTCEG score recompute
  2. 2026-09-19 21:49 UTCGHSA enrichment
  3. 2026-09-18 21:21 UTCEG score recompute
  4. 2026-09-18 21:21 UTCGHSA enrichment
  5. 2026-09-18 19:28 UTCEPSS rescore
  6. 2026-09-17 20:38 UTCEG score recompute
  7. 2026-09-17 20:38 UTCGHSA enrichment
  8. 2026-09-17 19:32 UTCEPSS rescore
  9. 2026-09-16 20:10 UTCEG score recompute
  10. 2026-09-16 20:10 UTCGHSA enrichment
  11. 2026-09-16 14:09 UTCEPSS rescore
  12. 2026-09-16 05:15 UTCEPSS rescore
  13. 2026-09-15 19:42 UTCEG score recompute
  14. 2026-09-15 19:42 UTCGHSA enrichment
  15. 2026-09-15 03:12 UTCEPSS rescore
  16. 2026-09-15 03:12 UTCEPSS rescore
  17. 2026-09-14 19:13 UTCGHSA enrichment
  18. 2026-09-13 18:45 UTCEG score recompute
  19. 2026-09-13 18:45 UTCGHSA enrichment
  20. 2026-09-12 18:17 UTCEG score recompute
  21. 2026-09-12 18:17 UTCGHSA enrichment
  22. 2026-09-11 17:49 UTCEG score recompute
  23. 2026-09-11 17:49 UTCGHSA enrichment
  24. 2026-09-11 14:53 UTCEPSS rescore
  25. 2026-09-11 14:53 UTCEPSS rescore
Show 17 more
  1. 2026-09-10 17:22 UTCEG score recompute
  2. 2026-09-10 17:22 UTCGHSA enrichment
  3. 2026-09-09 16:52 UTCEG score recompute
  4. 2026-09-09 16:52 UTCGHSA enrichment
  5. 2026-09-09 16:27 UTCNVD updateCVSS v4 → 2.1
  6. 2026-09-09 15:35 UTCEG score recompute
  7. 2026-09-09 15:35 UTCGHSA enrichment
  8. 2026-09-09 15:34 UTCMITRE cvelistV5CVSS v4 → 5.3
  9. 2026-09-09 14:10 UTCEG score recompute
  10. 2026-09-09 14:10 UTCGHSA enrichment
  11. 2026-09-08 22:01 UTCEPSS rescore
  12. 2026-09-08 13:42 UTCGHSA enrichment
  13. 2026-09-08 03:34 UTCEG score recompute
  14. 2026-09-08 03:34 UTCGHSA enrichment
  15. 2026-09-08 03:33 UTCNVD updateCVSS v4 → 2.1
  16. 2026-09-08 02:30 UTCEG score recompute
  17. 2026-09-08 02:29 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-86512?
CVE-2026-86512 is a medium vulnerability published on September 8, 2026. 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.…
When was CVE-2026-86512 disclosed?
CVE-2026-86512 was first published in the National Vulnerability Database on September 8, 2026, with the most recent update on September 9, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-86512 actively exploited?
CVE-2026-86512 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 88.6% of all scored CVEs.
What is the CVSS score of CVE-2026-86512?
CVE-2026-86512 has a CVSS v3 base score of 6.3 (NVD).
How do I remediate CVE-2026-86512?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-86512, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-86512

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