Database modification via crafted event-log Cypher injection
Published Apr 27, 2026 · Updated Apr 27, 2026
Cypher injection in JPCERT/CC LogonTracer before 2.0.0 allows remote attackers to alter Neo4j database contents through crafted Windows event logs. The event-log importer incorporates attacker-controlled log fields into Cypher query logic without adequate syntax neutralization; the vendor has not published the affected function or query construction. Exploitation requires an operator to load malicious event-log data, and the reported consequence is limited to database integrity.
Summary
What happened
Cypher injection in JPCERT/CC LogonTracer before 2.0.0 allows remote attackers to alter Neo4j database contents through crafted Windows event logs. The event-log importer incorporates attacker-controlled log fields into Cypher query logic without adequate syntax neutralization; the vendor has not published the affected function or query construction. Exploitation requires an operator to load malicious event-log data, and the reported consequence is limited to database integrity.
The record
- CVE
- CVE-2026-33566
- Published
- Apr 27, 2026
- Updated
- Apr 27, 2026
- Vendor
- Japan Computer Emergency Response Team Coordination Center (JPCERT/CC)
- Product
- LogonTracer
- Classifications
- CWE-943, T1565.001
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Apr 27, 2026CVE publishedPublication date reported by the CVE source.
- Apr 27, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
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- Affected versionversion=prior to v2.0.0
What conditions does exploitation require?
What is affected?
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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