A flaw has been found in java-json-tools json-patch up to 1.13. Affected is the function JsonMergePatch.fromJson of the file JsonMergePatchDeserializer.java. Executing a manipulation can lead to stack-based buffer overflow. The attack may be performed from remote. The exploit has been published and may be used. The project was informed of the problem early through an issue report but has not responded yet.

Metrics

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact None

Vulnerable System Availability Impact Low

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact Low

User Interaction None

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact Low

User Interaction None

Access Vector Network

Access Complexity Low

Authentication None

Confidentiality Impact None

Integrity Impact None

Availability Impact Partial

This CVE is not in the KEV list.

Exploitation poc

Automatable yes

Technical Impact partial

Affected Vendors & Products

Vendors Products
Java-json-tools
  • Json-patch

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References
Link Providers
https://github.com/java-json-tools/json-patch/ cve-icon cve-icon
https://github.com/java-json-tools/json-patch/issues/168 cve-icon cve-icon
https://vuldb.com/cve/CVE-2026-86318 cve-icon cve-icon
https://vuldb.com/submit/908319 cve-icon cve-icon
https://vuldb.com/vuln/399509 cve-icon cve-icon
https://vuldb.com/vuln/399509/cti cve-icon cve-icon
History

Tue, 08 Sep 2026 14:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Mon, 07 Sep 2026 14:45:00 +0000

Type Values Removed Values Added
Description A flaw has been found in java-json-tools json-patch up to 1.13. Affected is the function JsonMergePatch.fromJson of the file JsonMergePatchDeserializer.java. Executing a manipulation can lead to stack-based buffer overflow. The attack may be performed from remote. The exploit has been published and may be used. The project was informed of the problem early through an issue report but has not responded yet.
Title java-json-tools json-patch JsonMergePatchDeserializer.java JsonMergePatch.fromJson stack-based overflow
First Time appeared Java-json-tools
Java-json-tools json-patch
Weaknesses CWE-119
CWE-121
CPEs cpe:2.3:a:java-json-tools:json-patch:*:*:*:*:*:*:*:*
Vendors & Products Java-json-tools
Java-json-tools json-patch
References
Metrics cvssV2_0

{'score': 5, 'vector': 'AV:N/AC:L/Au:N/C:N/I:N/A:P/E:POC/RL:ND/RC:C'}

cvssV3_0

{'score': 5.3, 'vector': 'CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R'}

cvssV3_1

{'score': 5.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R'}

cvssV4_0

{'score': 6.9, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P'}
cve-icon MITRE

Status: PUBLISHED

Assigner: VulDB

Published: 2026-09-07T14:30:14.737Z

Updated: 2026-09-08T13:03:26.676Z

Reserved: 2026-09-07T05:32:59.436Z

Link: CVE-2026-86318

cve-icon Vulnrichment

Updated: 2026-09-08T13:03:05.833Z

cve-icon NVD

Status : Deferred

Published: 2026-09-07T15:17:34.040

Modified: 2026-09-08T14:17:34.430

Link: CVE-2026-86318

cve-icon Redhat

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