CVE-2026-113602

json-smart through 2.6.0 Strict-Mode Validation Bypass via 0x1A Character

Published Oct 20, 2026 CVSS 4.0 · 6.9 Medium EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

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

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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
VulnCheck
Published
Updated
Oct 20, 2026, 4:30 PM
Reserved
Oct 20, 2026, 11:48 AM
Status
Awaiting Analysis
Published
Oct 20, 2026, 4:17 PM
Modified
Oct 20, 2026, 8:06 PM
Severity
Moderate
Public date
Oct 20, 2026, 3:40 PM