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CVE-2018-1000861

Deserialization of Untrusted Data in Jenkins

9.8 CriticalIn KEVPublic exploitFix available

A code execution vulnerability exists in the Stapler web framework used by Jenkins 2.153 and earlier, LTS 2.138.3 and earlier in stapler/core/src/main/java/org/kohsuke/stapler/MetaClass.java that allows attackers to invoke some methods on Java objects by accessing crafted URLs that were not intended to be invoked this way.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
High
Integrity
High
Availability
High

Exploit likelihood

98.3%Up 64.1 points since Apr 14, 2021
90%50%10%1%

What each source reports

NVD Score used 9.8

A code execution vulnerability exists in the Stapler web framework used by Jenkins 2.153 and earlier, LTS 2.138.3 and earlier in stapler/core/src/main/java/org/kohsuke/stapler/MetaClass.java that allows attackers to invoke some methods on Java objects by accessing crafted URLs that were not intended to be invoked this way.

Record
CVE-2018-1000861
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0
10.0 HighAV:N/AC:L/Au:N/C:C/I:C/A:C
Weakness
CWE-502
Updated
2026-11-02
CVE List 9.8

A code execution vulnerability exists in the Stapler web framework used by Jenkins 2.153 and earlier, LTS 2.138.3 and earlier in stapler/core/src/main/java/org/kohsuke/stapler/MetaClass.java that allows attackers to invoke some methods on Java objects by accessing crafted URLs that were not intended to be invoked this way.

Record
CVE-2018-1000861
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness
CWE-502
Updated
2026-11-02
EUVDEUVD-2022-4161 9.8

A code execution vulnerability exists in the Stapler web framework used by Jenkins 2.153 and earlier, LTS 2.138.3 and earlier in stapler/core/src/main/java/org/kohsuke/stapler/MetaClass.java that allows attackers to invoke some methods on Java objects by accessing crafted URLs that were not intended to be invoked this way.

Record
EUVD-2022-4161
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
GitHub AdvisoriesGHSA-hhpm-5cp2-hg4x 9.8

Deserialization of Untrusted Data in Jenkins

A code execution vulnerability exists in the Stapler web framework used by Jenkins 2.153 and earlier, LTS 2.138.3 and earlier in stapler/core/src/main/java/org/kohsuke/stapler/MetaClass.java that allows attackers to invoke some methods on Java objects by accessing crafted URLs that were not intended to be invoked this way.

Record
GHSA-hhpm-5cp2-hg4x
CVSS 3.0
9.8 CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:H
Weakness
CWE-502
Updated
2026-11-02
CISA KEV No score

Jenkins Stapler Web Framework Deserialization of Untrusted Data Vulnerability

A code execution vulnerability exists in the Stapler web framework used by Jenkins

Record
CVE-2018-1000861
Weakness
CWE-502
Updated
2026-11-02
OSV 9.8

A code execution vulnerability exists in the Stapler web framework used by Jenkins 2.153 and earlier, LTS 2.138.3 and earlier in stapler/core/src/main/java/org/kohsuke/stapler/MetaClass.java that allows attackers to invoke some methods on Java objects by accessing crafted URLs that were not intended to be invoked this way.

Record
CVE-2018-1000861
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVGHSA-hhpm-5cp2-hg4x 9.8

Deserialization of Untrusted Data in Jenkins

A code execution vulnerability exists in the Stapler web framework used by Jenkins 2.153 and earlier, LTS 2.138.3 and earlier in stapler/core/src/main/java/org/kohsuke/stapler/MetaClass.java that allows attackers to invoke some methods on Java objects by accessing crafted URLs that were not intended to be invoked this way.

Record
GHSA-hhpm-5cp2-hg4x
CVSS 3.0
9.8 CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:H
Weakness
CWE-502
Updated
2026-11-02
OSVRHBA-2019:0024 8.8

Red Hat Bug Fix Advisory: OpenShift Container Platform 3.11 bug fix and enhancement update

Record
RHBA-2019:0024
CVSS 3.0
8.8 HighCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
org.jenkins-ci.main:jenkins-core
Maven
 through 2.138.3
2.138.4
org.jenkins-ci.main:jenkins-core
Maven
 2.140 to 2.153
2.154
org.jenkins-ci.main:jenkins-core
Maven
 before 2.138.4, plus listed versions
1.3961.3971.3981.3991.400
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1.4011.4031.4041.4051.4061.4071.4081.4091.409.11.409.21.409.31.4101.4111.4121.4131.4141.4151.4161.4171.4181.4191.4201.4211.4221.4231.4241.424.11.424.21.424.31.424.41.424.51.424.61.4251.4261.4271.4281.4291.4301.4311.4321.4331.4341.4351.4361.437
2.138.4
org.jenkins-ci.main:jenkins-core
Maven
 2.140 up to 2.154, plus listed versions
2.1412.1422.1432.1442.145
Show 11 moreShow less
2.1462.1472.1482.1492.1502.150.12.150.22.150.32.1512.1522.153
2.154
jenkins
Red Hat:openshift:3.11::el7
From an advisory covering 4 CVEs
 before 0:2.138.4.1544416383-1.el7
0:2.138.4.1544416383-1.el7

Public exploits

Links only. Every CVE stores no exploit code.

Public exploits
SourceLinkDate
MetasploitJenkins ACL Bypass and Metaprogramming RCE2019-01-08
PoC in GitHub1NTheKut/CVE-2019-1003000_RCE-DETECTION2019-04-24
PoC in GitHubsmokeintheshell/CVE-2018-10008612023-09-13
PoC in GitHubCyberCTF/vulhub-jenkins-cve-2018-10008612026-10-08
NucleiJenkins - Remote Command Injection

History

History
RecordedChangedSources
affected
exploitation, exploits
first indexedCVE List, EUVD, GitHub Advisories, CISA KEV, Metasploit, Nuclei, NVD, OSV, PoC in GitHub

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2018-1000861 is a critical vulnerability (CVSS 9.8) in Jenkins, published December 10, 2018. CISA lists it as known to be exploited, since February 10, 2022. EUVD reports exploitation since February 10, 2022. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 98.3%, the 99th percentile. Fixed in org.jenkins-ci.main:jenkins-core 2.138.4.

References

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Left out here: 451 versions. The JSON record has them.

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