---
id: CVE-2026-86511
title: A vulnerability was found in java-json-tools jackson-coreutils 2.0
summary: >-
  A vulnerability was found in java-json-tools jackson-coreutils 2.0. Affected
  by this vulnerability is the function BigDecimal.toPlainString of the file
  src/main/java/com/github/fge/jackson/JacksonUtils.java. Performing a
  manipulation res…
severity: medium
cvss: 5.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L'
cwe:
  - CWE-400
  - CWE-404
vendor: java-json-tools
product: jackson-coreutils
affected:
  - jackson-coreutils 2.0
published: '2026-09-08'
updated: '2026-09-08'
sourceUpdated: '2026-09-08T13:17:30.117'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-86511'
references:
  - url: 'https://github.com/java-json-tools/jackson-coreutils/'
    label: cna@vuldb.com
  - url: 'https://github.com/java-json-tools/jackson-coreutils/issues/65'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/cve/CVE-2026-86511'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/submit/908322'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/vuln/399664'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/vuln/399664/cti'
    label: cna@vuldb.com
tags:
  - nvd
  - cve.org
  - exploit-available
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-08T12:30:17.661680Z'
epss: 0.00701
epssPercentile: 0.51201
ingestedAt: '2026-09-08T15:33:26.982Z'
---

## Overview

A vulnerability was found in java-json-tools jackson-coreutils 2.0. Affected by this vulnerability is the function BigDecimal.toPlainString of the file src/main/java/com/github/fge/jackson/JacksonUtils.java. Performing a manipulation results in resource consumption. The attack may be initiated remotely. The exploit has been made public and could be used. The project was informed of the problem early through an issue report but has not responded yet.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.