EUVD-2026-16343
GHSA-h9q6-hc68-35rp
7.5
CVSS 3.1
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CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Lifecycle Timeline
3
Analysis Generated
Mar 26, 2026 - 20:01 vuln.today
EUVD ID Assigned
Mar 26, 2026 - 20:01 euvd
EUVD-2026-16343
CVE Published
Mar 26, 2026 - 19:40 nvd
HIGH 7.5
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.
Analysis
Truncated msgpack fixext format data (codes 0xd4-0xd8) decoded by shamaton/msgpack library versions across v1, v2, and v3 fail to validate input buffer boundaries, triggering out-of-bounds memory reads and runtime panics that enable denial of service. Remote attackers can craft malformed msgpack payloads to crash applications using affected library versions without requiring authentication or user interaction.
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Priority Score
38
Low
Medium
High
Critical
KEV: 0
EPSS: +0.0
CVSS: +38
POC: 0
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External POC / Exploit Code
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