CVE-2020-2179Network attack vector

Remote code execution via unrestricted YAML constructors

Published Apr 16, 2020 · Updated Aug 4, 2024

Deserialization in Jenkins Yaml Axis Plugin 0.2.0 and earlier allows remote authenticated users to execute code via crafted YAML. YamlFileLoader and YamlTextLoader pass file or inline YAML to SnakeYAML's unrestricted default constructor, enabling arbitrary type instantiation. Exploitation requires Matrix-job configuration access or control of the SCM repository used by an existing job, and successful execution compromises the Jenkins controller.

CVSS severity8.8
High
EPSS probability2.87%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Deserialization in Jenkins Yaml Axis Plugin 0.2.0 and earlier allows remote authenticated users to execute code via crafted YAML. YamlFileLoader and YamlTextLoader pass file or inline YAML to SnakeYAML's unrestricted default constructor, enabling arbitrary type instantiation. Exploitation requires Matrix-job configuration access or control of the SCM repository used by an existing job, and successful execution compromises the Jenkins controller.

The record

CVE
CVE-2020-2179
Published
Apr 16, 2020
Updated
Aug 4, 2024
Vendor
Jenkins Project
Product
Jenkins Yaml Axis Plugin
Classifications
CWE-502, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 16, 2020CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 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=unspecified <=0.2.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Jenkins Project · Jenkins Yaml Axis Pluginversion=unspecified <=0.2.0

Published CVSS scores

8.8GitHub Advisory DatabaseCVSS:3.1/AV:N/AC:L/PR:L/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

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

Public exploit references

No public exploit references are available in this record.

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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