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CVE-2026-42129

Path traversal in the Loki data source plugin

HIGH
7.7
CVSS Score
Published: June 22, 2026 at 01:18 PM UTC
Updated: October 25, 2026 at 11:10 PM UTC
2 products affected across 1 vendorLoki DatasourceGrafana

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Severity
HIGH7.7
Exploit prediction
EPSS 0.4%
SSVC
No known exploit

Description

The Loki datasource plugin's callResource handler contains a path traversal vulnerability. An authenticated Viewer-role user can escape the plugin's resource sandbox and access administrative Loki endpoints (e.g. /config, /services, /ready) to extract sensitive backend configuration and internal service information.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Loki Datasource· Grafanagrafana-plugin
95%
All versions
Grafana· Grafana
90%
11.6.0 ≤ v ≤ 11.6.1412.2.0 ≤ v ≤ 12.2.812.3.0 ≤ v ≤ 12.3.612.4.0 ≤ v ≤ 12.4.313.0.0 ≤ v ≤ 13.0.111.6.012.2.012.3.012.4.013.0.0

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

Vendor AdvisoryBroken Link
Source: cverecord
https://grafana.com/security/security-advisories/cve-2026-42129

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.7HIGHGRAFANA
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-22

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