CVE-2026-42129 — Vulnerability in github.com/grafana/grafana — CVE...

HIGH

Grafana Loki datasource plugin's callResource handler contains a path traversal vulnerability.

Published June 22, 2026Updated September 28, 2026Source: osv

Summary

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.

Advisory Timeline

First published June 22, 2026 (112 days ago).
Last revised September 28, 2026 — 98 days after initial publication.

Remediation

Upgrade to the fixed version using your package manager.

Update github.com/grafana/grafana to 1.9.2-0.20260616075434-82ef13993059 or later

go get github.com/grafana/grafana@v1.9.2-0.20260616075434-82ef13993059

After upgrading, run your dependency scanner again to confirm the vulnerability is resolved.

Affected Packages (6)

Affects 1 ecosystem: go (1).

Package	Ecosystem	Affected	Fixed In
github.com/grafana/grafana	go	All versions	Range-based data available
github.com/grafana/grafana	go	All versions	Range-based data available
github.com/grafana/grafana	go	All versions	1.9.2-0.20260616075434-82ef13993059
github.com/grafana/grafana	go	All versions	Range-based data available
github.com/grafana/grafana	go	All versions	Range-based data available
github.com/grafana/grafana	go	All versions	Range-based data available

Vulnerability Classification

Common Weakness Enumeration (CWE) identifiers for this vulnerability type.

CWE-22
Path TraversalMITRE

CVSS Score Breakdown

What the CVSS (Common Vulnerability Scoring System) 7.7 score means for each attack dimension.

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Changed

Confidentiality

High

Integrity

None

Availability

None

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N

References

Frequently Asked Questions

What is CVE-2026-42129?: Grafana Loki datasource plugin's callResource handler contains a path traversal vulnerability. This vulnerability has been assigned a severity rating of HIGH (CVSS score: 7.7/10).
How do I check if my project is affected by CVE-2026-42129?: CVE-2026-42129 affects github.com/grafana/grafana. Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2026-42129 and 200,000+ other known vulnerabilities.

Severity & Exploitability

CVSS Score

7.7

High exploitability or significant impact. Prioritize remediation within days.

Also Known As

GHSA-f74p-cwhp-x2wx

GO-2026-6544

Related CVEs

CVE-2025-41118
CRITICAL
Pyroscope Exposes Storage Secret
CVE-2023-3128
CRITICAL
Grafana vulnerable to Authentication Bypass by Spoofing
CVE-2021-41244
CRITICAL
Grafana Fine-grained access control vulnerability
CVE-2024-9264
CRITICAL
Grafana Command Injection And Local File Inclusion Via Sql Expressions
CVE-2022-39328
CRITICAL
Grafana Race condition allowing privilege escalation
CVE-2025-41115
CRITICAL
Grafana Incorrect Privilege Assignment vulnerability
CVE-2026-42127
HIGH
Grafana: Pre-authentication denial of service in the public dashboard query handler
CVE-2026-11769
MEDIUM
Grafana Operator: Privilege escalation from namespace admin to cluster admin via GrafanaDashboard jsonnetLib fileName

Check if you're affected

Scan your dependencies to see if this vulnerability affects your projects.

Scan Your Dependencies