high7.5
CVE-2026-32284
Denial of service in github.com/shamaton/msgpack
Impact
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.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| go | github.com/shamaton/msgpack/v2 | <= 2.4.0 | none recorded |
| go | github.com/shamaton/msgpack/v3 | <= 3.1.0 | none recorded |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Shamaton | Msgpack | through 3.1.2 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/golang/vulndb/issues/4513
- https://github.com/shamaton/msgpack/issues/59
- https://pkg.go.dev/vuln/GO-2026-4513
- https://securityinfinity.com/research/shamaton-msgpack-oob-panic-fixext-dos-2026
- https://github.com/advisories/GHSA-h9q6-hc68-35rp
- https://nvd.nist.gov/vuln/detail/CVE-2026-32284