CVE-2026-53523

MEDIUM

Nezha Monitoring: OAuth2 Redirect URL — Host Header Injection

Title source: cna
STIX 2.1

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.

References (1)

Core 1
Core References

Scores

CVSS v3 6.8
EPSS 0.0023
EPSS Percentile 14.0%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact total

Details

CWE
CWE-601
Status published
Products (1)
nezhahq/nezha >= 1.0.0, < 2.2.0
Published Jun 12, 2026
Tracked Since Jun 13, 2026