High severity · published Jun 22, 2026
CVE-2026-42129
Path traversal in the Loki data source plugin
7.7
CVSS
0.4%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 38% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
GR
Grafana · Grafana
11.6.0 through 11.6.14; 12.2.0 through 12.2.8; 12.3.0 through 12.3.6; 12.4.0 through 12.4.3; 13.0.0 through 13.0.1 · source: vendor
LD
Loki Datasource · Grafana
All versions, or not specified · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-42129
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-42129
Broken Link
https://grafana.com/security/security-advisories/cve-2026-42129
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