What is CVE-2026-53523?

CVE-2026-53523 is a medium-severity vulnerability in Nezhahq Nezha, classified under URL Redirection to Untrusted Site (Open Redirect). CVSS score: 6.8/10. Published 2026-06-12.

How severe is CVE-2026-53523?

Medium severity. CVSS v3 base score is 6.8 out of 10.

Open Redirect in Nezhahq Nezha

CVE-2026-53523

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…

Vulnerability class: Open Redirect

EPSS: 0.002 (15.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.8 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N.

Affected products

Nezhahq Nezha — versions >= 1.0.0, < 2.2.0

Weakness classification (CWE)

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

References

security-advisories@github.com (x_refsource_CONFIRM)

Frequently asked questions

What is CVE-2026-53523?: CVE-2026-53523 is a medium-severity vulnerability in Nezhahq Nezha, classified under URL Redirection to Untrusted Site (Open Redirect). CVSS score: 6.8/10. Published 2026-06-12.
How severe is CVE-2026-53523?: Medium severity. CVSS v3 base score is 6.8 out of 10.