What is CVE-2026-1337?

CVE-2026-1337 is a medium-severity vulnerability in Neo4j Community Edition, classified under Improper Output Neutralization for Logs. CVSS score: 5.4/10. Published 2026-02-06.

How severe is CVE-2026-1337?

Medium severity. CVSS v3 base score is 5.4 out of 10.

Is CVE-2026-1337 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Neo4j Community Edition

CVE-2026-1337

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 produc…

EPSS: 0.002 (11.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.

Affected products

Weakness classification (CWE)

CWE-117 — Improper Output Neutralization for Logs

Public proof-of-concept exploits

George0Papasotiriou/CVE-2026-1337-AI-Coding-Assistant-Prompt-Injection-to-Sandbox-Escape

References

3b236295-4ccd-4a1f-a1c1-a72eecc8d7b6 (Exploit, Third Party Advisory, exploit)

Frequently asked questions

What is CVE-2026-1337?: CVE-2026-1337 is a medium-severity vulnerability in Neo4j Community Edition, classified under Improper Output Neutralization for Logs. CVSS score: 5.4/10. Published 2026-02-06.
How severe is CVE-2026-1337?: Medium severity. CVSS v3 base score is 5.4 out of 10.
Is CVE-2026-1337 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.