Vulnerability · Published Jun 12, 2026 · Assigned by GitHub_M

CVE-2026-49397Nezha Monitoring: Private services (`EnableShowInService: false`) are enumerable via per-server endpoints, leaking name and timing data

Medium 5.3

In plain English

A medium-severity information exposure in nezha from nezhahq. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 23% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)5.3Medium

Exploit odds (30 days)0.3%top 76.6% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

Nezha Monitoring is a self-hostable, lightweight, servers and websites monitoring and O&M tool. From version 2.0.0 to before version 2.0.14, private services (`EnableShowInService: false`) are enumerable via per-server endpoints, leaking name and timing data. This issue has been patched in version 2.0.14.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Go	github.com/nezhahq/nezha	2.0.14	GHSA-vrmh-5mmx-hjwx
Go	github.com/nezhahq/nezha	no fix listed	GO-2026-5672

Affected products (as reported)

Vendor	Product	Versions
nezhahq	nezha	>= 2.0.0, < 2.0.14

Weakness: CWE-200, CWE-285, CWE-863 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

References

https://github.com/nezhahq/nezha/security/advisories/GHSA-vrmh-5mmx-hjwx x_refsource_CONFIRM