CVE-2022-41719: Unmarshal can panic on some inputs, possibly allowing for denial of service attacks.

Q: How do I fix CVE-2022-41719?

messagepack: upgrade to 2.1.1. Exact commands for each OS are on this page.

Q: Is CVE-2022-41719 being exploited?

CVE-2022-41719 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2022-41719 affect?

CVE-2022-41719 affects messagepack. Severity is high (CVSS 7.5). Unmarshal can panic on some inputs, possibly allowing for denial of service attacks.

Q: How urgent is CVE-2022-41719?

Priority 53/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

This week

HIGH 7.5REMOTEUPGRADE

CVE-2022-41719 is a high-severity flaw (CVSS 7.5) affecting messagepack. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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

Why this priority

High severity
Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.1% (top 34%)
CISA exploited list	No
Published	2022-11-10
Last modified	2026-06-17

Publisher (CNA): Go Project · Vendor: messagepack project

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2022-11-10 20:15 UTCPublished CVE record published
2026-06-17 05:03 UTCUpdated Record last modified

messagepack project messagepack UPGRADE

Affected: < 2.1.1

Fixed in: 2.1.1

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy messagepack || rpm -q messagepack || messagepack --version

2. UPGRADE to 2.1.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade messagepack

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade messagepack

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2022-41719?

messagepack: upgrade to 2.1.1. Exact commands for each OS are on this page.

Is CVE-2022-41719 being exploited?

CVE-2022-41719 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2022-41719 affect?

CVE-2022-41719 affects messagepack. Severity is high (CVSS 7.5). Unmarshal can panic on some inputs, possibly allowing for denial of service attacks.

How urgent is CVE-2022-41719?

Priority 53/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

Related CVEs

CVE-2026-57585 HIGH 7.5 UPGRADE MessagePack is the serializer implementation for Python msgpack.org
CVE-2026-54522 MEDIUM 5.4 UPGRADE MessagePack for Ruby is an implementation of the MessagePack binary serialization format
CVE-2026-48517 HIGH 7.5 UPGRADE MessagePack for C# is a MessagePack serializer for C#
CVE-2026-48516 HIGH 7.5 UPGRADE MessagePack for C# is a MessagePack serializer for C#
CVE-2026-48515 HIGH 7.5 UPGRADE MessagePack for C# is a MessagePack serializer for C#

References

← Back to latest CVEs