Host Header Injection Vulnerability in Nezha Monitoring Tool by NezhaHQ
CVE-2026-53523

6.8MEDIUM

Key Information:

Vendor

Nezhahq

Status
Nezha
Vendor
CVE Published:
12 June 2026

What is CVE-2026-53523?

The Nezha Monitoring tool, utilized for monitoring servers and websites, is susceptible to a host header injection vulnerability. This arises in the getRedirectURL function, where it constructs the OAuth2 callback URL by improperly using the request's Host header without validating it. As a result, this flaw can allow malicious actors to manipulate the Host header leading to potential redirection attacks. Users are advised to update to version 2.2.0 or later, where the vulnerability has been patched to enhance security.

Affected Version(s)

nezha >= 1.0.0, < 2.2.0

References

https://github.com/nezhahq/nezha/security/advisories/GHSA...
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CVSS V3.1

Score:
6.8
Severity:
MEDIUM
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.