CVE-2026-53521 MEDIUM

CVE-2026-53521: Nezha Monitoring: Stored future DDNS profile ID allows unauthorized use of another user's DDNS profile context

Vendor Nezhahq
Product nezha
Weakness CWE-863 · Incorrect authorization
Published June 12, 2026
Last update June 15, 2026
View on NVD All CVEs

CVSS base score

6.4/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality None
Integrity Low

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:L

What the vulnerability does

01Description

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, PATCH /server/{id} accepts and persists nonexistent ddns_profiles IDs for a member-owned server. If another user later creates a DDNS profile with one of those IDs, the DDNS worker resolves the stored ID and dispatches an update using the other user's DDNS profile configuration in the context of the attacker's server. This issue has been patched in version 2.1.0.

Key dates

02Disclosure timeline

June 12, 2026 CVE published
June 15, 2026 Record updated