PatchSiren cyber security CVE debrief

CVE-2026-53520 nezhahq CVE debrief

CVE-2026-53520 is a medium-severity vulnerability in Nezha Monitoring, a self-hostable, lightweight 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. This issue has been patched in version 2.1.0. The CVSS score for this vulnerability is 6.5, indicating a medium severity.

Vendor: nezhahq
Product: nezha
CVSS: MEDIUM 6.5
CISA KEV: Not listed in stored evidence
Original CVE published: 2026-06-12
Original CVE updated: 2026-06-12
Advisory published: 2026-06-12
Advisory updated: 2026-06-12

Who should care

Users of Nezha Monitoring versions 2.0.14 to 2.1.0 should apply the patch in version 2.1.0 to prevent authenticated users from claiming the dashboard Host through NAT and preempting all dashboard routing.

Technical summary

The vulnerability exists in Nezha Monitoring from version 2.0.14 to before version 2.1.0. Authenticated users can exploit this vulnerability to claim the dashboard Host through NAT and preempt all dashboard routing. The CVSS vector for this vulnerability is CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Defensive priority

Medium

Recommended defensive actions

Apply the patch in version 2.1.0 of Nezha Monitoring to prevent authenticated users from claiming the dashboard Host through NAT and preempting all dashboard routing.

Evidence notes

The CVE record for CVE-2026-53520 can be found at [cve-org]. The NVD detail for this vulnerability is available at [nvd]. The source item URL is [source-item]. A source reference for this vulnerability is available at [ref-4].

Official resources

CVE-2026-53520 was published on 2026-06-12T22:16:52.097Z and has not been modified since then.