CVEs / CVE-2018-1000861

CVE-2018-1000861: Jenkins Stapler Web Framework Deserialization of Untrusted Data Vulnerability

Known exploited in the CISA KEV catalog since 10 Feb 2022
critical 9.8 CVSS 3.1 (NVD)
EPSS 98.3% chance of exploitation in the next 30 days, higher than 99% of CVEs (30 Oct 2026)
Last changed at its sources 24 Oct 2026

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Summary

A code execution vulnerability exists in the Stapler web framework used by Jenkins
CISA, Known Exploited Vulnerabilities catalog

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.
The CVE record, via NVD · published 10 Dec 2018 · NVD status: Analyzed

Affected and fixed versions

As stated by the CVE record (from the CNA)
Product	Affected	Fixed in
n/a n/a	n/a	—

As stated by OSV
Product	Affected	Fixed in
org.jenkins-ci.main:jenkins-core (Maven)	before 2.138.4	2.138.4
org.jenkins-ci.main:jenkins-core (Maven)	from 2.140, before 2.154	2.154

Package versions from GHSA-hhpm-5cp2-hg4x.

Exploitation

In CISA KEV since	10 Feb 2022
Due date for US federal agencies	10 Aug 2022
Used in ransomware campaigns	Unknown
Required action	Apply updates per vendor instructions.

Severity

CVSS 3.1	9.8 critical `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H` Scored by NVD
Weakness	CWE-502

References

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

Sources

Exploitation status from the CISA Known Exploited Vulnerabilities catalog. EPSS scores from FIRST. Descriptions, severity and references from the National Vulnerability Database. Open-source package versions from OSV (CC-BY 4.0). Text is shown as each source states it; Stackurity does not edit it. Check the vendor's advisory before acting.

This product uses data from the NVD API but is not endorsed or certified by the NVD.