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 (4)
Core 4
Scores
CVSS v3
7.5
EPSS
0.0038
EPSS Percentile
29.8%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CISA SSVC
Vulnrichment
Exploitation
poc
Automatable
yes
Technical Impact
partial
Details
CWE
CWE-125
Status
published
Products (5)
github.com/shamaton/msgpack/github.com/shamaton/msgpack
github.com/shamaton/msgpack/v2/github.com/shamaton/msgpack/v2
github.com/shamaton/msgpack/v3/github.com/shamaton/msgpack/v3
shamaton/msgpack
< 3.1.2
shamaton/msgpack
0 (2 CPE variants)Go
Published
Mar 26, 2026
Tracked Since
Mar 27, 2026