JenkinsApplication
CVE-2018-1000406
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedA path traversal vulnerability exists in Jenkins 2.145 and earlier, LTS 2.138.1 and earlier in core/src/main/java/hudson/model/FileParameterValue.java that allows attackers with Job/Configure permission to define a file parameter with a file name outside the intended directory, resulting in an arbitrary file write on the Jenkins master when scheduling a build.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · high confidenceA path traversal vulnerability in Jenkins FileParameterValue allows attackers with Job/Configure permission to specify file names containing directory traversal sequences (e.g., ../../) to write files outside the intended temporary directory, resulting in arbitrary file write on the Jenkins master during build scheduling.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data
JenkinsApplication
<= 2.138.1<= 2.145CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- Low
- Privileges
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- High
- Availability
- None
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Check your Jenkins versionNavigate to Manage Jenkins > About Jenkins, or check the version displayed in the Jenkins footer on any page. If you have CLI access, run: java -jar jenkins.war --versionAffected if The installed version is 2.138.1 or lower, or any version from 2.139 through 2.145 (not 2.146+ or LTS 2.138.2+)
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Identify jobs using File ParameterReview your Jenkins jobs for parameters of type FileParameterValue. In the Jenkins UI, go to each job > Configure > Parameters section. Look for parameters with type File. Alternatively, search configuration XML files in $JENKINS_HOME/jobs/ for <hudson.model.FileParameterValue> entries.Affected if Any job is configured with a File parameter type, allowing users to upload files with controllable filenames during builds
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Verify who holds Job/Configure permissionNavigate to Manage Jenkins > Manage Users, then check job-level permissions or Matrix Authorization Strategy in Manage Jenkins > Configure Global Security. Look for users or groups granted the Job/Configure permission.Affected if Any untrusted or broad user account has Job/Configure permission, which would allow them to exploit the path traversal
You are affected if your Jenkins version is 2.145 or lower (excluding LTS 2.138.2+) AND you have jobs configured with File parameters AND untrusted users have Job/Configure permission.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
From vendor dataUpgrade Jenkins to version 2.146 or later (LTS 2.138.2 or later). Additionally, restrict Job/Configure permission to trusted users only as a defense-in-depth measure.
Fix this in Jenkins
Scoped from the published advisory
- Consultation2.0 h
- Implementation3.0 h
- Testing2.0 h
- Review / QA1.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $2,272.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2018-1000406 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2018-1000406 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
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