CVE-2026-107298Medium· 5.3▾ Sunlitmsgpack5 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 …
▾ Sunlit zone — Low / medium · no exploitation signal
impact 29.2 · likelihood 0 · exploitation 0
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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.
Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Affected packages:
msgpack5 < 6.1.0Patched in:
msgpack5 6.1.0Connected by shared product, vendor, weakness, or advisory.
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