CVE-2026-32284

high

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.

References

Advisories
More

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

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

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

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-16343

Details

Source: Mitre, NVD

Published: 2026-03-26

Updated: 2026-10-07

Named Vulnerability: GO-2026-4740Named Vulnerability: GO-2026-4513Named Vulnerability: GHSA-h9q6-hc68-35rp

Risk Information

CVSS v2

Base Score: 7.8

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C

Severity: High

CVSS v3

Base Score: 7.5

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