CVE-2024-28212Public exploitNetwork attack vector

Unauthenticated code execution via unsafe YAML deserialization

Published Mar 7, 2024 · Updated Aug 12, 2024

Unsafe deserialization in NAVER Corporation nGrinder before 3.5.9 allows remote attackers to execute code through a crafted YAML request. The unauthenticated /script/api/github/validate endpoint passes the request body's YAML content to SnakeYAML's vulnerable-by-default Yaml.loadAll sink. No account or user interaction is required, and a crafted object graph executes commands with the privileges of the nGrinder controller process.

CVSS severity9.8
Critical
EPSS probability1.02%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Unsafe deserialization in NAVER Corporation nGrinder before 3.5.9 allows remote attackers to execute code through a crafted YAML request. The unauthenticated /script/api/github/validate endpoint passes the request body's YAML content to SnakeYAML's vulnerable-by-default Yaml.loadAll sink. No account or user interaction is required, and a crafted object graph executes commands with the privileges of the nGrinder controller process.

The record

CVE
CVE-2024-28212
Published
Mar 7, 2024
Updated
Aug 12, 2024
Vendor
NAVER Corporation
Product
nGrinder
Classifications
CWE-502, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 7, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 12, 2024Record 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 <3.5.9

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

NAVER Corporation · nGrinderversion=0 <3.5.9

Published CVSS scores

9.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-502Deserialization of Untrusted Data
T1190Exploit Public-Facing Application

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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