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CVE-2018-1000861

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.

Actively exploited: CISA added it to its Known Exploited Vulnerabilities catalog on 10 Feb 2022.

Severity
Critical 9.8
Published
10 Dec 2018
Last changed
17 Jun 2026
Added to UpHeron
1 Nov 2026
Exploit chance
98% in the next 30 daysHigher than 99% of CVEs. EPSS by FIRST, 10 Nov 2026
Weakness
Deserialization of untrusted data (CWE-502)
Attack
Over the network · No login needed · No user action needed
Attacker can
Read data · Change data · Take it down
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Sources
NVD

Affected software

SoftwareAffected versions
JenkinsServers and applications · cpe:a:jenkins:jenkins
  • Every version up to 2.138.3
  • Every version up to 2.153

Known exploited

CISA name
Jenkins Stapler Web Framework Deserialization of Untrusted Data Vulnerability
Required action
Apply updates per vendor instructions.
Due for US agencies
10 Aug 2022
Used in ransomware
Not known

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2018-1000861
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2018-1000861