CVE-2026-107298
msgpack5: Deeply nested input can exhaust the decoder stack
CVSS Score
5.3
EPSS Score
0.0%
EPSS Percentile
0th
msgpack5 is a msgpack v5 implementation for node.js and the browser. Prior to 6.1.0, the array and map decoding paths have no nesting-depth limit, allowing an attacker who can provide MessagePack input to submit deeply nested containers that exhaust the JavaScript call stack and interrupt a process, worker, or request handler. This issue is fixed in version 6.1.0.
| CWE | CWE-674 |
| Vendor | mcollina |
| Product | msgpack5 |
| Published | Oct 8, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
Low
Affected Versions
mcollina / msgpack5
< 6.1.0