{"id":"CVE-2026-53523","revision":"09cff566192d4f3aacc9e701d5ecd572","records":[{"revision":"09cff566192d4f3aacc9e701d5ecd572","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-53523","aliases":[],"title":"Nezha Monitoring: OAuth2 Redirect URL — Host Header Injection","description":"Nezha Monitoring is a self-hostable, lightweight, servers and websites monitoring and O&M tool. From version 1.0.0 to before version 2.2.0, the getRedirectURL function in oauth2.go:22-29 constructs the OAuth2 callback URL by concatenating the request's Host header with a fixed path, with zero validation of the Host header. This can result in host header injection. This issue has been patched in version 2.2.0.","state":0,"publishedAt":"2026-06-12T21:04:46.741+00:00","modifiedAt":"2026-06-15T21:35:45.175+00:00","affected":[{"ecosystem":"Vendor product","name":"nezha","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"nezhahq\",\n                    \"product\": \"nezha\",\n                    \"versions\": [\n                        {\n                            \"version\": \">= 1.0.0, < 2.2.0\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N","score":6.8,"severity":"MEDIUM"}],"references":["https://github.com/nezhahq/nezha/security/advisories/GHSA-9rc6-8cjv-rcvx"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-53523","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-53523","identifiers":["CVE-2026-53523"]},"retained":false,"historicalAffected":[]}],"coverage":[]}