CVE-2018-1000861

Name: CVE-2018-1000861
Creator: NVD / NIST
Published: 2018-12-10T14:29:01.417+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10Actively ExploitedEPSS 98.33%

Last modified Jun 17, 2026

CVE-2018-1000861 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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.. CISA has confirmed active exploitation in the wild. EPSS estimates a 98.33% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

98.33%

99.9th percentile

Probability of exploitation in the next 30 days. Learn more

Exploitation Status

This vulnerability is listed in CISA’s Known Exploited Vulnerabilities catalog, confirming active exploitation in the wild. Federal agencies must remediate by Aug 10, 2022.

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Jenkins	Jenkins	<= 2.138.3
Jenkins	Jenkins	<= 2.153
Redhat	Openshift Container Platform	3.11

References

http://packetstormsecurity.com/files/166778/Jenkins-Remote-Code-Execution.htmlThird Party Advisory, VDB Entry
http://www.securityfocus.com/bid/106176Broken Link
https://access.redhat.com/errata/RHBA-2019:0024Third Party Advisory
https://jenkins.io/security/advisory/2018-12-05/#SECURITY-595Vendor Advisory
http://packetstormsecurity.com/files/166778/Jenkins-Remote-Code-Execution.htmlThird Party Advisory, VDB Entry
http://www.securityfocus.com/bid/106176Broken Link
https://access.redhat.com/errata/RHBA-2019:0024Third Party Advisory
https://jenkins.io/security/advisory/2018-12-05/#SECURITY-595Vendor Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-1000861US Government Resource

Timeline

Published: Dec 10, 2018
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2018-1000861?

How severe is CVE-2018-1000861?

CVE-2018-1000861 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 98.33% probability of exploitation in the next 30 days. This vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog.

How do I fix CVE-2018-1000861?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST