Medium 5.3Published Oct 8, 2026

CVE-2026-107298msgpack5: Deeply nested input can exhaust the decoder stack

Updated under an hour ago (2026-10-19 06:30 UTC)

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Every CVE for mcollina msgpack5

Exploited in the last 30 days

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.

CVSS: 5.3 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Weakness (CWE): CWE-674
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Deferred
Record last updated: Oct 9, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

mcollina msgpack5 mcollina:msgpack5 (from the name)	before 6.1.0	CNA record

References

https://github.com/mcollina/msgpack5/security/advisories/GHSA-24ch-f2g6-9hhhx-refsource-confirm
https://github.com/mcollina/msgpack5/commit/1e2b5874e555dd7c99417f64788a03b0590bb102x-refsource-misc
https://github.com/mcollina/msgpack5/releases/tag/v6.1.0x-refsource-misc

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.