AssemblaApplication · Jenkins
CVE-2026-57304
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 missing permission check in Jenkins Assembla Plugin 1.4 and earlier allows attackers with Overall/Read permission to connect to an attacker-specified URL using an attacker-specified username and password.
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 confidenceThe Assembla Plugin for Jenkins lacks proper permission enforcement on an API endpoint. Users with basic Overall/Read permission (the lowest privilege level in Jenkins) can trigger the plugin to connect to arbitrary URLs with attacker-controlled credentials, enabling potential SSRF, data exfiltration, or lateral movement from the Jenkins server.
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
AssemblaApplication
<= 1.4CVSS 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
- Low
- Integrity
- Low
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/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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Verify Assembla plugin is installedNavigate to Manage Jenkins > Manage Plugins > Installed tab and search for 'Assembla', or use the Jenkins CLI: java -jar jenkins-cli.jar list-plugins | grep -i assemblaAffected if The Assembla plugin appears in the installed plugins list
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Check Assembla plugin versionIn Manage Jenkins > Manage Plugins > Installed tab, find the Assembla plugin and note the Version column; or check the manifest file: $JENKINS_HOME/plugins/assembla-plugin/META-INF/MANIFEST.MFAffected if The installed version is 1.4 or earlier
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Verify the plugin API endpoint accessibilityAttempt to access the Assembla plugin API endpoint (typically under /assembla-api/ or similar) using a test account with only Overall/Read permissionAffected if Requests to the plugin API succeed without requiring Overall/Administer permission
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Check configured Assembla credentialsNavigate to Manage Jenkins > Configure System > Assembla configuration section, or inspect $JENKINS_HOME/com.dabsquared.assembla.config.xml if it existsAffected if Assembla credentials are configured and the plugin API accepts attacker-controlled URL parameters
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Confirm current permission modelIn Manage Jenkins > Manage Users, verify that users exist with only Overall/Read permission; in Manage Jenkins > Global Security, confirm the authorization strategy does not restrict plugin API access beyond standard permissionsAffected if Users with Overall/Read permission can access plugin functionality that should require Overall/Administer
You are affected if the Assembla plugin is installed at version 1.4 or lower, and users with basic Overall/Read permission can access the plugin API without elevated privileges.
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 to Assembla Plugin version 1.5 or later which implements proper permission checks requiring Overall/Administer access for sensitive operations.
Fix this in Assembla
Scoped from the published advisory
- Consultation2.0 h
- Implementation4.0 h
- Testing3.0 h
- Review / QA2.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $3,088.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-57304 — 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-2026-57304 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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A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.
- 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
- No spam, self-promotion, credentials, or personal data