CVE-2026-107298CWE-674

CVE-2026-107298

Medium · published October 8, 2026

CVSS v3.1
5.3
EPSS
0%
Percentile
29.9
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
5.3 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
CVSS v4.0
Not supplied
EPSS
0.00372 · 29.9th percentile
Weakness
CWE-674 · Uncontrolled Recursion
Published
2026-10-08T21:17Z
References (3)
https://github.com/mcollina/msgpack5/commit/1e2b5874e555dd7c99417f64788a03b0590bb102 · [email protected]https://github.com/mcollina/msgpack5/releases/tag/v6.1.0 · [email protected]https://github.com/mcollina/msgpack5/security/advisories/GHSA-24ch-f2g6-9hhh · [email protected]
EPSS history
Timeline
  • 10 OCT 03:27Z
    EPSS moved — → 0%
    epss
  • 08 OCT 17:08Z
    msgpack5: Deeply nested input can exhaust the decoder stack
    cvelistv5
  • 08 OCT 17:08Z
    msgpack5: Deeply nested input can exhaust the decoder stack
    cvelistv5