Denial of service in github.com/buger/jsonparser

The Delete function fails to properly validate offsets when processing malformed JSON input. This can lead to a negative slice index and a runtime panic, allowing a denial of service attack.

Problem type

CWE-125: Out-of-bounds Read

Affected products

github.com/buger/jsonparser

github.com/buger/jsonparser

References

github.com

https://github.com/buger/jsonparser/issues/275

github.com

https://github.com/golang/vulndb/issues/4514

pkg.go.dev

https://pkg.go.dev/vuln/GO-2026-4514

JSON source

https://cveawg.mitre.org/api/cve/CVE-2026-32285

Click to expand

{
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "cveMetadata": {
    "cveId": "CVE-2026-32285",
    "assignerOrgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
    "assignerShortName": "Go",
    "dateUpdated": "2026-03-26T19:40:51.837Z",
    "dateReserved": "2026-03-11T16:38:46.556Z",
    "datePublished": "2026-03-26T19:40:51.837Z",
    "state": "PUBLISHED"
  },
  "containers": {
    "cna": {
      "providerMetadata": {
        "orgId": "1bb62c36-49e3-4200-9d77-64a1400537cc",
        "shortName": "Go",
        "dateUpdated": "2026-03-26T19:40:51.837Z"
      },
      "title": "Denial of service in github.com/buger/jsonparser",
      "descriptions": [
        {
          "lang": "en",
          "value": "The Delete function fails to properly validate offsets when processing malformed JSON input. This can lead to a negative slice index and a runtime panic, allowing a denial of service attack."
        }
      ],
      "affected": [
        {
          "vendor": "github.com/buger/jsonparser",
          "product": "github.com/buger/jsonparser",
          "collectionURL": "https://pkg.go.dev",
          "packageName": "github.com/buger/jsonparser",
          "programRoutines": [
            {
              "name": "Delete"
            },
            {
              "name": "FuzzDelete"
            }
          ],
          "defaultStatus": "affected"
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "lang": "en",
              "description": "CWE-125: Out-of-bounds Read"
            }
          ]
        }
      ],
      "references": [
        {
          "url": "https://github.com/buger/jsonparser/issues/275"
        },
        {
          "url": "https://github.com/golang/vulndb/issues/4514"
        },
        {
          "url": "https://pkg.go.dev/vuln/GO-2026-4514"
        }
      ]
    }
  }
}