---
id: CVE-2026-113602
title: json-smart through 2.6.0 Strict-Mode Validation Bypass via 0x1A Character
summary: >-
  json-smart through 2.6.0 contains an input validation bypass vulnerability
  that allows attackers to evade strict-mode trailing-data checks by inserting a
  literal 0x1A character. Attackers can append 0x1A and malformed content to
  pass JSO…
severity: medium
cvss: 5.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N'
cvssSource: cna
cwe:
  - CWE-147
vendor: json-smart
product: json-smart
affected:
  - json-smart <= 2.6.0
ssvc:
  exploitation: poc
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-10-20T16:30:31.776341Z'
exploitAvailable: true
published: '2026-10-20'
updated: '2026-10-20'
sourceUpdated: '2026-10-20T16:30:53.742Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-113602'
references:
  - url: 'https://github.com/netplex/json-smart-v2/issues/302'
  - url: >-
      https://github.com/netplex/json-smart-v2/blob/v2.6.0/json-smart/src/main/java/net/minidev/json/parser/JSONParserBase.java
  - url: >-
      https://www.vulncheck.com/advisories/json-smart-through-2.6.0-strict-mode-validation-bypass-via-0x1a-character
    label: >-
      VulnCheck Advisory: json-smart through 2.6.0 Strict-Mode Validation Bypass
      via 0x1A Character
tags:
  - cve.org
  - exploit-available
ingestedAt: '2026-10-20T16:10:53.305Z'
---

## Overview

json-smart through 2.6.0 contains an input validation bypass vulnerability that allows attackers to evade strict-mode trailing-data checks by inserting a literal 0x1A character. Attackers can append 0x1A and malformed content to pass JSONValue.parseStrict or isValidJsonStrict validation, creating parser differentials with downstream parsers like Jackson or Gson.

## Affected

- `json-smart <= 2.6.0`

## Remediation

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