Nezha Monitoring: Authenticated agents can forge service-monitor results for other users' services
Priority MEDIUM 64CWE-862Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- None · High · Low
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-862.
Summary
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.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00314 24th percentileScored 2026-11-07
Fix Fixed nezha (nezhahq): 2.0.12github.com/nezhahq/nezha (Go): 1.14.15-0.20260521020202-02129f16fb15, 2.0.12
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| nezhahq | nezha | 0.20.0 to before 2.0.12 | 2.0.12 | Patch available | CNA |
| — | github.com/nezhahq/nezha (Go) | 0.20.0 to before 1.14.15-0.20260521020202-02129f16fb15 | 1.14.15-0.20260521020202-02129f16fb15 | Patch available | GHSA-4g6j-g789-rghm |
| — | github.com/nezhahq/nezha (Go) | 2.0.0 to before 2.0.12 | 2.0.12 | Patch available | GHSA-4g6j-g789-rghm |
- nezha Vendornezhahq Affected 0.20.0 to before 2.0.12 Fixed in 2.0.12 Patch available CNA
- github.com/nezhahq/nezha (Go) Vendor— Affected 0.20.0 to before 1.14.15-0.20260521020202-02129f16fb15 Fixed in 1.14.15-0.20260521020202-02129f16fb15 Patch available GHSA-4g6j-g789-rghm
- github.com/nezhahq/nezha (Go) Vendor— Affected 2.0.0 to before 2.0.12 Fixed in 2.0.12 Patch available GHSA-4g6j-g789-rghm
Remediation
- Fix · CNA nezha (nezhahq) Fixed in 2.0.12
- Fix · GHSA-4g6j-g789-rghm github.com/nezhahq/nezha (Go) Fixed in 1.14.15-0.20260521020202-02129f16fb15 Advisory →
- Fix · GHSA-4g6j-g789-rghm github.com/nezhahq/nezha (Go) Fixed in 2.0.12 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2026-48119
- 2026-10-03 Alias added: GHSA-4g6j-g789-rghm
References
More nezhahq vulnerabilities
- TI-2026-65123 Nezha through 2.2.3 Host Header Injection via OAuth2 redirect_uri CVSS 4.0CRITICAL 9.3
- TI-2026-34341 Nezha Monitoring: RoleMember can run shell on every server (cross-tenant RCE) via POST /api/v1/cron CVSS 3.1CRITICAL 9.9
- TI-2026-34342 Nezha Monitoring: RoleMember-reachable SSRF with full response-body reflection via POST /api/v1/notification CVSS 3.1HIGH 7.7
- TI-2026-38597 Nezha Monitoring: OAuth2 Redirect URL — Host Header Injection CVSS 3.1MEDIUM 6.8
- TI-2026-75131 Memory exhaustion in Nezha file manager WebSocket endpoint CVSS 4.0HIGH 7.1
- TI-2026-75130 Nezha WebSocket transfer endpoint flaw enables denial of service CVSS 4.0HIGH 7.1
Sources
- CVE-2026-48119 · CVE Program
- CVE-2026-48119 · NVD
- FIRST EPSS
- GHSA-4g6j-g789-rghm · GitHub Advisory Database · CC BY 4.0
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