{"cve":"CVE-2026-53521","nvd":{"published":"2026-06-12T22:16:52.230","modified":"2026-10-25T23:10:00.167","status":"Deferred","description":"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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:L","score":6.4},"cwes":["CWE-863"],"references":["https://github.com/nezhahq/nezha/security/advisories/GHSA-39g2-8x68-pmx8","https://github.com/nezhahq/nezha/security/advisories/GHSA-39g2-8x68-pmx8"],"products":[],"source":"nvd","synced_at":"2026-10-25T23:44:33.281319194+00:00"},"epss":{"cve":"CVE-2026-53521","score":0.00228,"percentile":0.13403,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-39g2-8x68-pmx8","url":"https://osv.dev/vulnerability/GHSA-39g2-8x68-pmx8","summary":"Nezha Monitoring: Stored future DDNS profile ID allows unauthorized use of another user's DDNS profile context","modified":"2026-07-07T16:11:30.530756967Z","packages":[{"ecosystem":"Go","name":"github.com/nezhahq/nezha","purl":"pkg:golang/github.com/nezhahq/nezha","ranges":[">=2.0.14 <2.1.0"],"fixed":["2.1.0"]}]},{"id":"GO-2026-5826","url":"https://osv.dev/vulnerability/GO-2026-5826","summary":"Nezha Monitoring: Stored future DDNS profile ID allows unauthorized use of another user's DDNS profile context in github.com/nezhahq/nezha","modified":"2026-07-07T16:00:20.861428498Z","packages":[{"ecosystem":"Go","name":"github.com/nezhahq/nezha","purl":"pkg:golang/github.com/nezhahq/nezha","ranges":["all versions"],"fixed":[]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}