CVE-2026-32284

[CVE catalog]

A flaw was found in the msgpack decoder. A remote attacker could send specially crafted, truncated fixext data to an application using the msgpack library. This improper input validation can lead to an out-of-bounds read and a runtime panic, resulting in a denial of service (DoS) attack against the application. github.com/shamaton/msgpack: msgpack: Denial of Service via truncated fixext data The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Severity

High · CVSS 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Published

Mar 26, 2026, 7:40:51 PM UTC

Source

[NVD] · [CVE record]

EPSS

0.42% · Oct 27, 2026

{
  "package_releases": [],
  "fixed_versions": [],
  "distribution_packages": [
    {
      "name": "msgpack",
      "ecosystem": "cpe",
      "fixed_version": ""
    },
    {
      "name": "msgpack",
      "ranges": [
        {
          "fixed": "",
          "introduced": "",
          "last_affected": "3.1.2",
          "start_excluding": ""
        }
      ],
      "ecosystem": "cpe",
      "fixed_version": "",
      "provider_record_id": "NVD-CVE-2026-32284"
    }
  ]
}