CVE-2026-1337: NEO4J

Medium severity, CVSS 5.4. EPSS: 0.2% chance of exploitation in the next 30 days.

Insufficient escaping of unicode characters in query log in Neo4j Enterprise and Community editions prior to 2026.01 can lead to XSS if the user opens the logs in a tool that treats them as HTML. There is no security impact on Neo4j products, but this advisory is released as a precaution to treat the logs as plain text if using versions prior to 2026.01. Proof of concept exploit:  https://github.com/JoakimBulow/CVE-2026-1337

Affected products

• NEO4J NEO4J: before 2026.01.0 (fixed in 2026.01.0)

Published 2026-02-06. Last modified 2026-08-28.