What’s Vulnerable › Vulnerabilities

CVE-2026-113602: json-smart through 2.6.0 Strict-Mode Validation Bypass via 0x1A Character

• Severity: medium (CVSS 5.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-20 · updated 2026-10-20
• Weakness: CWE-147

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.

Affected products

• json-smart: through 2.6.0

References

• https://github.com/netplex/json-smart-v2/blob/v2.6.0/json-smart/src/main/java/net/minidev/json/parser/JSONParserBase.java
• https://github.com/netplex/json-smart-v2/issues/302
• https://www.vulncheck.com/advisories/json-smart-through-2.6.0-strict-mode-validation-bypass-via-0x1a-character
• https://github.com/netplex/json-smart-v2/issues/302

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