CVE-2026-32284

Published: Mar 26, 2026Modified: Jun 17, 2026

7.5

Vector

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

Exploitability: 3.9 / Impact: 3.6

Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Secondary)

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.

Affected (1)

Products: Shamaton: Msgpack

Shamaton

1 product

Msgpack

Configuration A

1 vulnerable

Vulnerable Software	Affected Versions
Shamaton Msgpack	Up to 3.1.2

Related CWEs

CWE-125

Out-of-bounds Read

The product reads data past the end, or before the beginning, of the intended buffer.

References (4)

https://github.com/golang/vulndb/issues/4513

Source: security@golang.org

Issue TrackingThird Party Advisory

https://github.com/shamaton/msgpack/issues/59

Source: security@golang.org

Issue TrackingVendor Advisory

https://pkg.go.dev/vuln/GO-2026-4513

Source: security@golang.org

Third Party Advisory

https://securityinfinity.com/research/shamaton-msgpack-oob-panic-fixext-dos-2026

Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0

ExploitThird Party Advisory

Timeline

No history available yet.