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

{
  "id": "ca3bac0c8a7a50df7cea1d35ccaa09419020b15572bf6eeb55721c7342c12a2b",
  "url": "https://osv.dev/vulnerability/CVE-2026-113602",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "json-smart through 2.6.0 Strict-Mode Validation Bypass via 0x1A Character",
    "summary": "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.",
    "evidence": "osv:CVE-2026-113602",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-113602",
      "aliases": [
        "CVE-2026-113602"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "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"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/netplex/json-smart-v2",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "last_affected": "ebf7cf8cf0dccef246cd1ed0d052074d787a2de4"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "2.6.0"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "2.6.0"
                      }
                    ],
                    "source": "DESCRIPTION"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v2.6.0",
            "2.5.2",
            "2.5.1",
            "2.5.0",
            "2.4.11",
            "2.4.10",
            "2.4.9",
            "2.4.8",
            "2.4.5",
            "2.4.1",
            "2.2"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-113602.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:31.168641152Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/113xxx/CVE-2026-113602.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-113602",
        "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",
        "https://github.com/netplex/json-smart-v2",
        "https://github.com/netplex/json-smart-v2/blob/v2.6.0/json-smart/src/main/java/net/minidev/json/parser/JSONParserBase.java"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-147"
        ],
        "cna_assigner": "VulnCheck",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/113xxx/CVE-2026-113602.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-113602",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 498250,
  "published_at": "2026-10-20T15:40:29.753+00:00"
}