What is CVE-2026-53520?

CVE-2026-53520 is a medium-severity vulnerability in Nezhahq Nezha, classified under Improper Access Control. CVSS score: 6.5/10. Published 2026-06-12.

How severe is CVE-2026-53520?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Vulnerability in Nezhahq Nezha

CVE-2026-53520

Nezha Monitoring is a self-hostable, lightweight, servers and websites monitoring and O&M tool. From version 2.0.14 to before version 2.1.0, authenticated users can claim the dashboard Host through NAT and preempt all dashboard routing. Th…

EPSS: 0.003 (20.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Affected products

Nezhahq Nezha — versions >= 2.0.14, < 2.1.0

Weakness classification (CWE)

CWE-284 — Improper Access Control

References

security-advisories@github.com (x_refsource_CONFIRM)

Frequently asked questions

What is CVE-2026-53520?: CVE-2026-53520 is a medium-severity vulnerability in Nezhahq Nezha, classified under Improper Access Control. CVSS score: 6.5/10. Published 2026-06-12.
How severe is CVE-2026-53520?: Medium severity. CVSS v3 base score is 6.5 out of 10.