Bug 2440637 (CVE-2026-27100)

Summary: CVE-2026-27100 org.jenkins-ci.main/jenkins-core: Jenkins: Information disclosure via unauthorized access to build parameters
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedKeywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in Jenkins. An attacker with Item/Build and Item/Configure permissions can exploit this vulnerability by submitting Run Parameter values that refer to builds they do not have authorization to access. This allows the attacker to obtain sensitive information, including the existence of jobs, the existence of builds, and the display names of specific builds. This is an information disclosure vulnerability.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description OSIDB Bzimport 2026-02-18 15:03:09 UTC
Jenkins 2.550 and earlier, LTS 2.541.1 and earlier accepts Run Parameter values that refer to builds the user submitting the build does not have access to, allowing attackers with Item/Build and Item/Configure permission to obtain information about the existence of jobs, the existence of builds, and if a specified build exists, its display name.