CVE-2026-53523

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.

PUBLISHED Reserved 2026-06-09 | Published 2026-06-12 | Updated 2026-06-15 | Assigner GitHub_M

Problem types

CWE-601: URL Redirection to Untrusted Site ('Open Redirect')

Product status

References

github.com/.../nezha/security/advisories/GHSA-9rc6-8cjv-rcvx exploit

github.com/.../nezha/security/advisories/GHSA-9rc6-8cjv-rcvx

cve.org (CVE-2026-53523)

nvd.nist.gov (CVE-2026-53523)

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