CVE-2026-113602
json-smart through 2.6.0 Strict-Mode Validation Bypass via 0x1A Character
CVSS Score
5.3
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-147 |
| Vendor | json-smart |
| Product | json-smart |
| Published | Oct 20, 2026 |
| Last Updated | Oct 20, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
None
Affected Versions
json-smart / json-smart
0 ≤ 2.6.0
References
github.com: https://github.com/netplex/json-smart-v2/issues/302 github.com: https://github.com/netplex/json-smart-v2/blob/v2.6.0/json-smart/src/main/java/net/minidev/json/parser/JSONParserBase.java vulncheck.com: https://www.vulncheck.com/advisories/json-smart-through-2.6.0-strict-mode-validation-bypass-via-0x1a-character
Credits
Yu Bao, PayPal Cyber Security Team