CVE-2022-41719Public exploitNetwork attack vector

Application crash via unchecked collection lengths

Published Nov 10, 2022 · Updated Apr 30, 2025

Improper input validation in shamaton msgpack before 2.1.1 allows remote attackers to crash consuming applications via malformed data. Unmarshal trusts declared array and map element counts without ensuring that the remaining buffer contains the minimum required bytes, leading to runtime panics. Exposure requires a consuming application to pass attacker-controlled MessagePack payloads to Unmarshal; a resulting panic can interrupt that application process.

CVSS severity7.5
High
EPSS probability1.11%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper input validation in shamaton msgpack before 2.1.1 allows remote attackers to crash consuming applications via malformed data. Unmarshal trusts declared array and map element counts without ensuring that the remaining buffer contains the minimum required bytes, leading to runtime panics. Exposure requires a consuming application to pass attacker-controlled MessagePack payloads to Unmarshal; a resulting panic can interrupt that application process.

The record

CVE
CVE-2022-41719
Published
Nov 10, 2022
Updated
Apr 30, 2025
Vendor
shamaton
Product
msgpack
Classifications
T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 10, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 30, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <2.1.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

shamaton · msgpackversion=0 <2.1.1

Published CVSS scores

7.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
7.5NISTCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

T1499.004Application or System Exploitation

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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