CVE-2026-53523

MEDIUM EPSS 14.2%

Published Jun 12, 20263w ago · Modified Jun 17, 20262w ago

6.8 CVSS 3.1

Medium

Published Jun 12, 2026 3w ago

Last Modified Jun 17, 2026 2w ago

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 Details

Base Score

6.8

Exploitability

1.6

Impact

5.2

Vector string

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N

Attack Vector Network

Attack Complexity High

Privileges Required None

User Interaction Required

Scope Unchanged

Confidentiality High

Integrity High

Availability None

Threat Intelligence

EPSS Exploit Probability

14.2% percentile

Exploit & Patch Status

No Known Exploit

No Patch Available

Weaknesses 1

CWE-601

References 1

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

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.