CVE-2026-32284

Severity CVSS v4.0:

Pending analysis

Type:

Unavailable / Other

Publication date:

26/03/2026

Last modified:

30/03/2026

Description

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.

Impact

Vector 3.x

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS v3.1 Severity and Metrics:

Base Score: 7.50 HIGH
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): None
Integrity (I): None
Availability (A): High

Base Score 3.x

7.50

Severity 3.x

HIGH

References to Advisories, Solutions, and Tools

https://github.com/golang/vulndb/issues/4513
https://github.com/shamaton/msgpack/issues/59
https://pkg.go.dev/vuln/GO-2026-4513
https://securityinfinity.com/research/shamaton-msgpack-oob-panic-fixext-dos-2026