CVE-2026-47124 json
Nezha WebSocket server stream discloses cross-tenant server telemetry to authenticated members
published 2026-05-23 5 mo ago modified 2026-10-25 14 d ago also GHSA-hvv7-hfrh-7gxj , GO-2026-5439 , EUVD-2026-36594
- cvss
- 6.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 27%
- public exploits
- 0
- none known
Summary
Nezha Monitoring is a self-hostable, lightweight, servers and websites monitoring and O&M tool. From version 1.4.0 to before version 2.0.9, any authenticated non-admin member can connect to the server-status WebSocket and receive telemetry for all servers, including servers owned by other users. The normal server list API filters objects by HasPermission, but the WebSocket stream treats the presence of any authenticated user as authorization for the full unfiltered server list. This issue has been patched in version 2.0.9.
Patch / fix
- go github.com/nezhahq/nezha 1.14.15-0.20260517034128-05e5da253519
- govulncheck-vulndb openSUSE Leap 16.0 0.0.20260723T184607-160000.1.1
opensuse advisories openSUSE-SU-2026:21483-1
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- no
- Technical impact
- partial
- Assessed
- 4 mo ago
Exploit prediction
0.34% chance of exploitation in the next 30 days, higher than 27% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- github.com https://github.com/nezhahq/nezha/security/advisories/GHSA-hvv7-hfrh-7gxj referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N |
| GitHub | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| go | github.com/nezhahq/nezha | >=1.4.0, <1.14.15-0.20260517034128-05e5da253519 |
1.14.15-0.20260517034128-05e5da253519 |
Affected products
- nezhahq nezha
Classification
- Weakness
-
- CWE-200 Exposure of Sensitive Information to an Unauthorized Actor
References
-
github.com
/nezhahq/nezha/security/advisories/GHSA-hvv7-hfrh-7gxj
exploit, web, advisory
-
nvd.nist.gov
/vuln/detail/CVE-2026-47124
advisory
-
github.com
/nezhahq/nezha
package
Sources
- CVE List CVE-2026-47124
- GitHub Advisory GHSA-hvv7-hfrh-7gxj
- NVD CVE-2026-47124
- OSV GO-2026-5439
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