CVE-2026-42129— Path traversal in the Loki data source plugin
Quick assessment
Affected
Grafana Grafana OSS
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
Grafana OSS是Grafana公司开源的一个可视化仪表盘。 Grafana OSS存在安全漏洞，该漏洞源于Loki datasource plugin的callResource处理程序存在路径遍历，可能导致经过身份验证的Viewer用户逃避插件的资源沙箱并访问管理端Loki端点，提取敏感后端配置和内部服务信息。
Possible ATT&CK Techniques 1 AI
T1005 · Data from Local SystemAffected Version Matrix 5
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Grafana | Grafana OSS | 11.6.0≤ 11.6.14 |
affected |
12.2.0≤ 12.2.8 |
affected | ||
12.3.0≤ 12.3.6 |
affected | ||
12.4.0≤ 12.4.3 |
affected | ||
13.0.0≤ 13.0.1 |
affected |
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I. Basic Information for CVE-2026-42129
Vulnerability Information
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Vulnerability Title
Path traversal in the Loki data source plugin
Source: CVE Program / CVE List V5
Vulnerability Description
A user with Viewer permissions can use a path traversal in the Loki data source plugin to reach administrative Loki endpoints and read sensitive backend configuration and internal service information.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: CVE Program / CVE List V5
Vulnerability Title
Grafana OSS 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Grafana OSS是Grafana公司开源的一个可视化仪表盘。 Grafana OSS存在安全漏洞，该漏洞源于Loki datasource plugin的callResource处理程序存在路径遍历，可能导致经过身份验证的Viewer用户逃避插件的资源沙箱并访问管理端Loki端点，提取敏感后端配置和内部服务信息。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Grafana | Grafana OSS | 11.6.0 ~ 11.6.14 | - |
|
II. Public POCs for CVE-2026-42129
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Advisories for CVE-2026-42129 (1)
-
🔗 404 Page not found | Grafana Labs vendor-advisory
Same Patch Batch · Grafana · 2026-06-22 · 5 CVEs total
| CVE-2026-28381 | 9.6 CRITICAL | Local File Read/Write to Potential Privilege Escalation via Snowflake GET/PUT |
| CVE-2026-42127 | 7.5 HIGH | Pre-authentication denial of service in the public dashboard query endpoint |
| CVE-2026-9029 | 7.3 HIGH | Stored XSS in the Geomap panel tile-layer attribution |
| CVE-2026-10601 | 5.4 MEDIUM | Path traversal in the Tempo and Loki data source plugins |
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V. Comments for CVE-2026-42129
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