Is CVE-2026-107298 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-107298?

CVE-2026-107298 has a CVSS v3 severity of MEDIUM (5.3).

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CVE-2026-107298

Description

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.