TI-2026-59100 Aliases CVE-2026-86318 GHSA-8hxc-hjmg-w3c7

java-json-tools json-patch JsonMergePatchDeserializer.java JsonMergePatch.fromJson stack-based overflow

HIGH 70CWE-119Published 2026-09-07 · Updated 2026-09-08

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Attack requirements: None
Impact type: —
Confidentiality · integrity · availability: None · None · Low
Fix status: Deferred Red Hat: fix deferred

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and Red Hat.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.00758 55th percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by the CNA

Fix Deferred Red Hat: fix deferred

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: Poc
Automatable: Yes
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
java-json-tools	json-patch	1.0; 1.1; 1.2; 1.3; 1.4; 1.5; 1.6; 1.7; 1.8; 1.9; 1.10; 1.11; 1.12; 1.13	—	No fix listed	CNA

json-patch Vendorjava-json-tools Affected 1.0; 1.1; 1.2; 1.3; 1.4; 1.5; 1.6; 1.7; 1.8; 1.9; 1.10; 1.11; 1.12; 1.13 Fixed in — No fix listed CNA

CPE names CNA · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:java-json-tools:json-patch::::::::	—	—	—

cpe:2.3:a:java-json-tools:json-patch:*:*:*:*:*:*:*:* Versions — — ·—

Remediation

No fixed version listed by the sources yet.

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

Product	Status	Plan or fix
Red Hat Build of Keycloak	Affected	No fix yet: Fix deferred
Red Hat Fuse 7	Affected	No fix yet: Fix deferred
Red Hat build of Apicurio Registry 3	Affected	No fix yet: Fix deferred
Red Hat build of Debezium 3	Affected	No fix yet: Fix deferred
Red Hat build of Quarkus	Affected	No fix yet: Fix deferred

Timeline

2026-10-02 Threatist record created from CVE-2026-86318
2026-10-03 Alias added: GHSA-8hxc-hjmg-w3c7

References

Exploit 1

https://github.com/java-json-tools/json-patch/issues/168

Patch 1

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

TI-2026-59204 Uncontrolled resource consumption in java-json-tools jackson-coreutils CVSS 4.0MEDIUM 6.9
TI-2026-59103 java-json-tools jackson-coreutils URL Validation JsonLoader.java JsonLoader.fromURL server-side request forgery CVSS 4.0MEDIUM 6.9
TI-2026-59101 java-json-tools json-patch Patch Operation JsonPatch.java JsonPatch.apply resource consumption CVSS 4.0MEDIUM 6.9
TI-2026-59202 java-json-tools jackson-coreutils JacksonUtils.java BigDecimal.toPlainString resource consumption CVSS 4.0MEDIUM 6.9
TI-2026-59203 java-json-tools json-patch Copy Move Operations CopyOperation.java MoveOperation.apply access control CVSS 4.0MEDIUM 5.3

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences