High 7.5Published Mar 26, 2026

CVE-2026-32284Denial of service in github.com/shamaton/msgpack

Updated under an hour ago (Oct 26, 2026, 7:10 PM ET)

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It affects github.com/shamaton/msgpack and 3 other products. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for github.com/shamaton/msgpack

Exploited in the last 30 days

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.

CVSS: 7.5 HIGH (v3.1, CISA ADP)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): CWE-125
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Go
NVD analysis: Analyzed
Record last updated: Oct 7, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

github.com/shamaton/msgpack github.com/shamaton/msgpack github.com_shamaton_msgpack:github.com_shamaton_msgpack (from the name)	All versions	CNA record
github.com/shamaton/msgpack/v2 github.com/shamaton/msgpack/v2 github.com_shamaton_msgpack_v2:github.com_shamaton_msgpack_v2 (from the name)	before 2.4.1	CNA record
github.com/shamaton/msgpack/v3 github.com/shamaton/msgpack/v3 github.com_shamaton_msgpack_v3:github.com_shamaton_msgpack_v3 (from the name)	before 3.1.1	CNA record
shamaton msgpack shamaton:msgpack	through 3.1.2	NVD

References

References

https://github.com/shamaton/msgpack/issues/59	issue-tracking, vendor-advisory
https://github.com/golang/vulndb/issues/4513	issue-tracking, third-party-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

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.