CVE-2026-32284

Denial of service in github.com/shamaton/msgpack

Published Mar 26, 2026 CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Github GHSA Github GHSA GHSA-h9q6-hc68-35rp Denial of service in github.com/shamaton/msgpack
History
Type Values Removed Values Added
Weaknesses CWE-125
CPEs cpe:2.3:a:shamaton:msgpack:*:*:*:*:*:go:*:*
Type Values Removed Values Added
References
Metrics cvssV3_1

{'score': 5.9, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}

Type Values Removed Values Added
Weaknesses CWE-119
Type Values Removed Values Added
Weaknesses CWE-805
References
Metrics threat_severity

None

cvssV3_1

{'score': 5.9, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H'}

threat_severity

Moderate

Type Values Removed Values Added
Weaknesses CWE-119
Type Values Removed Values Added
First Time appeared Shamaton
Shamaton msgpack
Vendors & Products Shamaton
Shamaton msgpack
Type Values Removed Values Added
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.
Title Denial of service in github.com/shamaton/msgpack
References
Weaknesses

Sources

Status
PUBLISHED
Assigner
Go
Published
Updated
Oct 7, 2026, 5:46 PM
Reserved
Mar 11, 2026, 4:38 PM
Status
Analyzed
Published
Mar 26, 2026, 8:16 PM
Modified
Oct 7, 2026, 6:17 PM
Severity
Moderate
Public date
Mar 26, 2026, 7:40 PM