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.
History

Wed, 21 Oct 2026 00:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-1286
References
Metrics threat_severity

None

threat_severity

Moderate


Tue, 20 Oct 2026 17:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

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


Tue, 20 Oct 2026 15:45:00 +0000

Type Values Removed Values Added
Description 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.
Title json-smart through 2.6.0 Strict-Mode Validation Bypass via 0x1A Character
First Time appeared Json-smart Project
Json-smart Project json-smart
Weaknesses CWE-147
CPEs cpe:2.3:a:json-smart_project:json-smart:*:*:*:*:*:*:*:*
Vendors & Products Json-smart Project
Json-smart Project json-smart
References
Metrics cvssV3_1

{'score': 5.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N'}

cvssV4_0

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


cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published: 2026-10-20T15:40:29.753Z

Updated: 2026-10-20T16:30:53.742Z

Reserved: 2026-10-20T11:48:48.998Z

Link: CVE-2026-113602

cve-icon Vulnrichment

Updated: 2026-10-20T16:30:43.366Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-10-20T16:17:09.923

Modified: 2026-10-20T20:06:37.150

Link: CVE-2026-113602

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-10-20T15:40:29Z

Links: CVE-2026-113602 - Bugzilla