CVE-2026-42129
Path traversal in the Loki data source plugin
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.
INFO
Published Date :
June 22, 2026, 2:17 p.m.
Last Modified :
July 10, 2026, 4:16 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
Affected Products
The following products are affected by CVE-2026-42129
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | HIGH | MITRE-CVE | ||||
| CVSS 3.1 | HIGH | [email protected] |
Solution
- Update the Loki datasource plugin to the latest version.
- Restrict access to sensitive Loki endpoints.
- Review and limit user role permissions.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-42129.
| URL | Resource |
|---|---|
| https://grafana.com/security/security-advisories/cve-2026-42129 | Broken Link |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-42129 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-42129
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-42129 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-42129 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
Jul. 10, 2026
Action Type Old Value New Value Changed Affected [{'vendor': 'Grafana', 'product': 'Grafana OSS', 'platforms': ['OnPrem'], 'defaultStatus': 'unaffected'}] [{'vendor': 'Grafana', 'product': 'Grafana OSS', 'versions': [{'status': 'affected', 'version': '11.6.0', 'versionType': 'semver', 'lessThanOrEqual': '11.6.14'}, {'status': 'affected', 'version': '12.2.0', 'versionType': 'semver', 'lessThanOrEqual': '12.2.8'}, {'status': 'affected', 'version': '12.3.0', 'versionType': 'semver', 'lessThanOrEqual': '12.3.6'}, {'status': 'affected', 'version': '12.4.0', 'versionType': 'semver', 'lessThanOrEqual': '12.4.3'}, {'status': 'affected', 'version': '13.0.0', 'versionType': 'semver', 'lessThanOrEqual': '13.0.1'}], 'defaultStatus': 'unaffected'}] Changed 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. 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. Added CWE CWE-22 -
Initial Analysis by [email protected]
Jun. 30, 2026
Action Type Old Value New Value Added CPE Configuration OR *cpe:2.3:a:grafana:loki_datasource:-:*:*:*:*:*:*:* Added Reference Type Grafana Labs: https://grafana.com/security/security-advisories/cve-2026-42129 Types: Broken Link -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jun. 24, 2026
Action Type Old Value New Value Added CWE CWE-22 -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jun. 22, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-42129', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-06-22T15:44:32.401117Z'} -
New CVE Received by [email protected]
Jun. 22, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'Grafana', 'product': 'Grafana OSS', 'platforms': ['OnPrem'], 'defaultStatus': 'unaffected'}] Added 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. Added CVSS V3.1 AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N Added Reference https://grafana.com/security/security-advisories/cve-2026-42129