CVE-2018-1000861
CriticalExploitedPublic exploitDeserialization of Untrusted Data in Jenkins
Published May 13, 2022 · Updated Jul 8, 2026 · Also known as GHSA-hhpm-5cp2-hg4x
Key Facts
Patch immediately- CVE-2018-1000861 is a critical-severity vulnerability (CVSS 9.8 v3.1) affecting Jenkins, Openshift Container Platform (Redhat), org.jenkins-ci.main:jenkins-core (maven).
- It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Jun 24, 2020 and is known to be used in ransomware campaigns. Public exploit code is available.
- EPSS estimates a 98% probability of exploitation in the next 30 days.
- Fixed versions are available, including Jenkins 0:2.138.4.1544416383-1.el7, Jenkins <=2.138.3, Jenkins <=2.153.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
CVSS v3.1
9.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS (30-day exploit likelihood)
98%
Higher than 99.9% of all scored CVEs
Exploited in the wild
Yes
4 catalog listings, used by ransomware
Public exploit code
Available
Proof-of-concept or weaponized module
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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.
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| CISA KEV | Feb 10, 2022 | Aug 10, 2022 | Not reported |
| Industry KEV feed | Jun 24, 2020 | Aug 10, 2022 | Known |
| CIRCL KEV | Feb 10, 2022 | Aug 10, 2022 | Not reported |
| ENISA EUVD | Feb 10, 2022 | n/a | Not reported |
Required action: Apply updates per vendor instructions.
Affected Products
5 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| JenkinsJenkins | See advisory | 2.153 |
| Openshift Container PlatformRedhat | 3.11 | n/a |
| org.jenkins-ci.main:jenkins-coremaven | See advisory | 2.154 |
Patched Releases
Jenkins
0:2.138.4.1544416383-1.el7, <=2.138.3, <=2.153
org.jenkins-ci.main:jenkins-core
2.138.4, 2.154
Timeline
Added to Industry KEV feed
Jun 24, 2020
Added to CISA KEV
Feb 10, 2022
Added to CIRCL KEV
Feb 10, 2022
Added to ENISA EUVD
Feb 10, 2022
Publicly disclosed
May 13, 2022
Last updated
Jul 8, 2026
Weakness Type
- CWE-470 Use of Externally-Controlled Input to Select Classes or Code ('Unsafe Reflection')
- CWE-502 Deserialization of Untrusted Data
References
- advisoryhttp://packetstormsecurity.com/files/166778/Jenkins-Remote-Code-Execution.html
- advisoryRHBA-2019:0024
- advisoryGHSA advisory
- advisoryhttps://jenkins.io/security/advisory/2018-12-05/#SECURITY-595
- advisoryhttps://nvd.nist.gov/vuln/detail/CVE-2018-1000861
FAQ
Common Questions.
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…
Affected: Jenkins; Openshift Container Platform (Redhat) versions 3.11; org.jenkins-ci.main:jenkins-core (maven). The full list is in the CVE brief.
It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Jun 24, 2020 and is known to be used in ransomware campaigns.
Yes. It was added on Feb 10, 2022 with a federal remediation due date of Aug 10, 2022.
Public exploit code is available.
Fixed versions are available, including Jenkins 0:2.138.4.1544416383-1.el7, Jenkins <=2.138.3, Jenkins <=2.153.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
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