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HazelcastApplication

CVE-2022-0265

CRITICAL · 9.8 CVSS v3.1 Published 2022-03-03
Patch available
A vendor patch is available. No clean upgrade release — apply the published patch.
See remediation →
100/100
Remediation priority · Urgent
Public exploit Remotely reachable No privileges Zero-click Patch available

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 · unedited
Improper Restriction of XML External Entity Reference in GitHub repository hazelcast/hazelcast in 5.1-BETA-1.

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
How this class of weakness works · CWE-611

An XML parser processes external entity references inside untrusted documents, letting an attacker read local files, reach internal systems, or exhaust resources. It's a common trap in anything that accepts XML. The fix is to disable external entities and DTD processing in the parser.

General guidance for the xml external entity (xxe) class — the official description and references above are authoritative for this specific CVE. Want a bespoke review and a reviewed fix? Ask our team →

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
HazelcastApplication
Affected:= 5.1

CVSS 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
None
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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 · scoped
Patch available Apply the vendor patch
Vendor patch github.com →
Recommended fix Moderate confidence

Hazelcast 5.1 stable or latest 5.1.x/5.2.x release

  1. 1. Identify all Hazelcast instances running version 5.1-BETA-1 in your environment
  2. 2. Check Hazelcast release notes and GitHub releases for version 5.1 stable and subsequent 5.1.x versions that include the security fix
  3. 3. Plan upgrade to the latest stable 5.1.x release or 5.2+ that contains the XXE fix from commit 4d6b666cd0291abd618c3b95cdbb51aa4208e748
  4. 4. Before upgrading, backup all configuration files and data
  5. 5. Test the upgrade in a staging environment to verify application compatibility
  6. 6. Schedule maintenance window for production upgrade
  7. 7. Execute upgrade following Hazelcast upgrade documentation
  8. 8. Verify the XXE vulnerability is resolved by testing XML parsing with external entity references
Caveat Review release notes for any configuration or API changes between 5.1-BETA-1 and target stable version

Generated from the published advisory — verify against the referenced sources before acting.

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2022-0265 in production — separate from our analysis above.

No notes yet

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What this is

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What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
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