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.
SeverityHigh
CVSS7.5
Exploit probability—
ProductShamaton Msgpack
PublishedMar 26, 2026
First seenMar 26, 2026
Weakness typeCWE-125Out-of-bounds read
How to fix
Update
- github.com/shamaton/msgpack/v22.4.1 or later
- github.com/shamaton/msgpack/v33.1.1 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| shamaton msgpack | v ≤ 3.1.2 | — |
| github.com/shamaton/msgpack/v2Go | v ≤ 2.4.0, v < 2.4.1, No range specified | 2.4.1 |
| github.com/shamaton/msgpack/v3Go | v ≤ 3.1.0, v < 3.1.1, No range specified | 3.1.1 |
| github.com/shamaton/msgpackGo | No range specified | — |
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