Vulnerability in Json-Smart
CVE-2026-113602
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 .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/netplex/json-smart-v2/issues/302 (issue-tracking)
- github.com/netplex/json-smart-v2/blob/v2.6.0/json-smart/src/main/java/net/minid… (technical-description)
- www.vulncheck.com/advisories/json-smart-through-2.6.0-strict-mode-validation-by… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-113602?
- CVE-2026-113602 is a medium-severity vulnerability in Json-Smart, classified under CWE-147. CVSS score: 5.3/10. Published 2026-10-20.
- How severe is CVE-2026-113602?
- Medium severity. CVSS v3 base score is 5.3 out of 10.