CVE-2026-53523: CWE-601: URL Redirection to Untrusted Site ('Open Redirect') in nezhahq nezha
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.
AI Analysis
Technical Summary
The vulnerability in Nezha Monitoring (CVE-2026-53523) is an open redirect caused by the getRedirectURL function in oauth2.go (lines 22-29) concatenating the request's Host header with a fixed path without validating the Host header. This host header injection can lead to URL redirection to untrusted sites. Versions from 1.0.0 up to but not including 2.2.0 are affected. The vulnerability has been patched in version 2.2.0.
Potential Impact
Successful exploitation can lead to users being redirected to malicious websites, potentially facilitating phishing or other social engineering attacks. The vulnerability impacts confidentiality and integrity by enabling attackers to redirect users to attacker-controlled domains. There is no direct impact on availability.
Mitigation Recommendations
Upgrade Nezha Monitoring to version 2.2.0 or later, where the vulnerability has been patched. Patch status is not explicitly stated as 'official-fix' in the advisory, but the description confirms the issue is fixed in 2.2.0. No other mitigations are specified.
CVE-2026-53523: CWE-601: URL Redirection to Untrusted Site ('Open Redirect') in nezhahq nezha
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.
CVSS v3.1
Score 6.8medium
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability in Nezha Monitoring (CVE-2026-53523) is an open redirect caused by the getRedirectURL function in oauth2.go (lines 22-29) concatenating the request's Host header with a fixed path without validating the Host header. This host header injection can lead to URL redirection to untrusted sites. Versions from 1.0.0 up to but not including 2.2.0 are affected. The vulnerability has been patched in version 2.2.0.
Potential Impact
Successful exploitation can lead to users being redirected to malicious websites, potentially facilitating phishing or other social engineering attacks. The vulnerability impacts confidentiality and integrity by enabling attackers to redirect users to attacker-controlled domains. There is no direct impact on availability.
Mitigation Recommendations
Upgrade Nezha Monitoring to version 2.2.0 or later, where the vulnerability has been patched. Patch status is not explicitly stated as 'official-fix' in the advisory, but the description confirms the issue is fixed in 2.2.0. No other mitigations are specified.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-06-09T17:30:33.456Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a2c7c93e617e2d834c6c820
Added to database: 06/12/2026, 21:39:31 UTC
Last enriched: 06/19/2026, 22:17:23 UTC
Last updated: 07/31/2026, 19:22:59 UTC
Views: 99
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