{"id":"CVE-2026-32284","title":"The msgpack decoder fails to properly validate the input buffer length when processing truncated fixext data (format codes 0xd4-0xd8)","summary":"The msgpack decoder fails to properly validate the input buffer length when processing truncated fixext data (format codes 0xd4-0xd8). This can lead to an out-of-bounds read and a runtime panic, allowing a denial of service attack.","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-125"],"vendor":"shamaton","product":"msgpack","affected":["msgpack <= 3.1.2"],"published":"2026-03-26","updated":"2026-10-07","sourceUpdated":"2026-10-07T18:17:20.127","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-32284","references":[{"url":"https://github.com/golang/vulndb/issues/4513","label":"security@golang.org"},{"url":"https://github.com/shamaton/msgpack/issues/59","label":"security@golang.org"},{"url":"https://pkg.go.dev/vuln/GO-2026-4513","label":"security@golang.org"},{"url":"https://securityinfinity.com/research/shamaton-msgpack-oob-panic-fixext-dos-2026","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"tags":["nvd","cve.org","exploit-available"],"exploitAvailable":true,"ssvc":{"exploitation":"poc","automatable":"yes","technicalImpact":"partial","timestamp":"2026-03-30T14:04:12.686407Z"},"epss":0.00695,"epssPercentile":0.51469,"ingestedAt":"2026-10-07T18:42:20.879Z","slug":"CVE-2026-32284","body":"## Overview\n\nThe msgpack decoder fails to properly validate the input buffer length when processing truncated fixext data (format codes 0xd4-0xd8). This can lead to an out-of-bounds read and a runtime panic, allowing a denial of service attack.\n\n## Affected\n\n- `msgpack <= 3.1.2`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"midnight","depthScore":53,"depthScoreParts":{"impact":41.3,"likelihood":0.1,"exploitation":12,"ransomware":0},"changes":[]}