CVE-2026-86318

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

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.

Affected

java-json-tools · json-patch

CVSS v4.0 VULDB

5.5 MEDIUMCVSS: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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CVSS v3.1 VULDB

5.3 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

CVSS v2.0 VULDB

5.0 MEDIUMAV:N/AC:L/Au:N/C:N/I:N/A:P

EPSS

0.76% chance of exploitation in the next 30 days, 54th percentile

Published

2026-09-07

Updated

2026-09-08

Proof-of-concept exploits (1)

• java-json-tools/json-patch/issues/168694★ · 2024-03-25

References

• CVE Record
• NVD entry

Related

• CVE-2026-86319
• CVE-2026-86321
• CVE-2026-86511
• CVE-2026-86512
• CVE-2026-86513