SyncopeApplication · Apache
CVE-2026-42782
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 · uneditedImproper Isolation or Compartmentalization vulnerability in Apache Syncope. An administrator with adequate entitlements for Implementations can create a malicious Groovy class containing untrusted code reaching a non-sandboxed execution path via the class static initializer. This issue affects Apache Syncope: 3.0 through 3.0.16, 4.0 through 4.0.5, 4.1.0. Users are recommended to upgrade to version 4.0.6 / 4.1.1, which fix this issue by forcing even the static initializer in Groovy code to run in a sandbox.
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 confidenceIn Apache Syncope, an administrator with Implementations entitlements can create malicious Groovy classes containing untrusted code that executes outside the sandbox via class static initializers, allowing arbitrary code execution with elevated privileges.
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
SyncopeApplication
>= 3.0.0, <= 3.0.16>= 4.0.0, < 4.0.6= 4.1.0CVSS 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
- High
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
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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Identify Apache Syncope versionLocate the deployed Apache Syncope instance and retrieve its version number. This is typically visible in the admin console footer, the WAR file name, or the product about page.Affected if The installed version falls within 3.0.0 to 3.0.16, 4.0.0 to 4.0.5, or exactly 4.1.0.
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Verify administrator Implementations accessReview user role assignments in the admin console. Locate roles that include the 'Implementations' entitlement or permission, which grants access to create and manage Groovy classes.Affected if Any administrator account holds the Implementations entitlement.
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Inspect existing Groovy implementationsAccess the Implementations section in the admin console. Examine any custom Groovy classes or scripts that have been created and deployed.Affected if Custom Groovy implementations exist in the system.
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Confirm Groovy execution contextReview the system configuration or logs to determine whether Groovy static initializers run within or outside the sandboxed security context.Affected if Static initializers execute outside the Groovy security sandbox.
You are affected if your Apache Syncope version is 3.0.0-3.0.16, 4.0.0-4.0.5, or 4.1.0 AND administrators with Implementations entitlements exist or custom Groovy implementations have been configured.
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.
dbcve · scoped4.0.6
Upgrade Apache Syncope to version 4.0.6 or 4.1.1, which forces even static initializers in Groovy code to run within a sandboxed environment.
4.0.6 or 4.1.1 (depending on whether migrating from 3.0.x or 4.x branch)
- Identify your current Apache Syncope version by checking the deployed WAR file or pom.xml dependencies
- If running 3.0.x: Plan upgrade path from 3.0.x to 4.0.6 or 4.1.1 (4.1.1 recommended for latest features)
- If running 4.0.x (< 4.0.6): Upgrade to version 4.0.6
- If running 4.1.0: Upgrade to version 4.1.1
- Review upgrade documentation at https://syncope.apache.org/docs/ for migration steps between major versions
- Update Maven pom.xml or dependency management to use the target version (e.g., <version>4.0.6</version> or <version>4.1.1</version>)
- Rebuild and redeploy the application
- Verify the upgrade by logging in as administrator and confirming Groovy implementation functionality works correctly
Generated from the published advisory — verify against the referenced sources before acting.
Fix this in Syncope
Scoped from the published advisory
- Consultation2.0 h
- Implementation4.0 h
- Testing6.0 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 $3,808.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-42782 — 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-2026-42782 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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- Version or environment caveats, and links to real fixes
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