Vulnerability · Published Jun 12, 2026 · Assigned by GitHub_M
CVE-2026-48119Nezha Monitoring: Authenticated agents can forge service-monitor results for other users' services
High 7.1
In plain English
A high-severity missing authorization 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 24% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)7.1High
Exploit odds (30 days)0.3%top 75.6% 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 0.20.0 to before version 2.0.12, authenticated agents can forge service-monitor results for other users' services. This issue has been patched in version 2.0.12.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Go | github.com/naiba/nezha | no fix listed | GO-2026-5119 |
| Go | github.com/nezhahq/nezha | 1.14.15-0.20260521020202-02129f16fb15 | GHSA-4g6j-g789-rghm |
| Go | github.com/nezhahq/nezha | 2.0.12 | GHSA-4g6j-g789-rghm |
| Go | github.com/nezhahq/nezha | 1.14.15-0.20260521020202-02129f16fb15 | GO-2026-5119 |
Affected products (as reported)
Weakness: CWE-862 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L
References
- https://github.com/nezhahq/nezha/security/advisories/GHSA-4g6j-g789-rghm x_refsource_CONFIRM