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.
Published: 2026-10-20
Score: 6.9 Medium
EPSS: n/a
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories

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History

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'}


Subscriptions

Json-smart Project Json-smart
cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

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 : Received

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

Modified: 2026-10-20T17:17:34.950

Link: CVE-2026-113602

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-20T17:45:13Z

Weaknesses
  • CWE-147

    Improper Neutralization of Input Terminators