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Description

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

PUBLISHED Reserved 2026-01-22 | Published 2026-02-06 | Updated 2026-02-06 | Assigner Neo4j




LOW: 1.1CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:P

Problem types

CWE-117 Improper Output Neutralization for Logs

Product status

Default status
unaffected

Any version before 2026.01.0
affected

Default status
unaffected

Any version before 2026.01.0
affected

Credits

Joakim Bülow finder

References

github.com/JoakimBulow/CVE-2026-1337 exploit

cve.org (CVE-2026-1337)

nvd.nist.gov (CVE-2026-1337)

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