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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
2026-06-15
Advisory published
2026-06-12
Advisory updated
2026-06-15

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].

Sources and references

Verified primary and authoritative sources

  • CVE-2026-53520 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-53520

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-53520 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-53520

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.