CVE-2026-32284

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2026-32284
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.

7.5 /10

CVSS v3 : HIGH

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://github.com/golang/vulndb/issues/4513 Issue Tracking Third Party Advisory
https://github.com/shamaton/msgpack/issues/59 Issue Tracking Vendor Advisory
https://pkg.go.dev/vuln/GO-2026-4513 Third Party Advisory
https://securityinfinity.com/research/shamaton-msgpack-oob-panic-fixext-dos-2026 Exploit Third Party Advisory
Configurations

Configuration 1 (hide)

cpe:2.3:a:shamaton:msgpack:*:*:*:*:*:go:*:*
History

03 Jun 2026, 14:42

Type Values Removed Values Added
First Time Shamaton
Shamaton msgpack
CPE cpe:2.3:a:shamaton:msgpack:*:*:*:*:*:go:*:*
CWE CWE-125
References () https://github.com/golang/vulndb/issues/4513 - () https://github.com/golang/vulndb/issues/4513 - Issue Tracking, Third Party Advisory
References () https://github.com/shamaton/msgpack/issues/59 - () https://github.com/shamaton/msgpack/issues/59 - Issue Tracking, Vendor Advisory
References () https://pkg.go.dev/vuln/GO-2026-4513 - () https://pkg.go.dev/vuln/GO-2026-4513 - Third Party Advisory
References () https://securityinfinity.com/research/shamaton-msgpack-oob-panic-fixext-dos-2026 - () https://securityinfinity.com/research/shamaton-msgpack-oob-panic-fixext-dos-2026 - Exploit, Third Party Advisory

30 Mar 2026, 15:16

Type Values Removed Values Added
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 7.5
References
  • () https://securityinfinity.com/research/shamaton-msgpack-oob-panic-fixext-dos-2026 -

30 Mar 2026, 13:26

Type Values Removed Values Added
Summary
  • (es) El decodificador msgpack no valida correctamente la longitud del búfer de entrada al procesar datos fixext truncados (códigos de formato 0xd4-0xd8). Esto puede provocar una lectura fuera de límites y un pánico en tiempo de ejecución, lo que permite un ataque de denegación de servicio.

26 Mar 2026, 20:16

Type Values Removed Values Added
New CVE
Information

Published : 2026-03-26 20:16

Updated : 2026-06-03 14:42

NVD link : CVE-2026-32284

Mitre link : CVE-2026-32284

CVE.ORG link : CVE-2026-32284

JSON object : View

Products Affected

shamaton

  • msgpack
CWE
CWE-125

Out-of-bounds Read