Answer in brief
CVE-2026-42129 records a High severity (CVSS 7.7) vulnerability in Path traversal in the Loki data source plugin. The current sources do not mark it as known exploited. The current feed maps Grafana/Grafana OSS (generic), github.com/grafana/grafana (go), github.com/grafana/grafana (go), github.com/grafana/grafana (go) and additional mapped packages. Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.7. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Grafana/Grafana OSS (generic), github.com/grafana/grafana (go), github.com/grafana/grafana (go), github.com/grafana/grafana (go) and additional mapped packages. Check affected ranges and fixed versions before updating.
| Product | Affected versions | Fixed versions |
|---|---|---|
| cpe:2.3:a:grafana:loki_datasource:-:*:*:*:*:*:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| Grafana/Grafana OSSgeneric | 11.6.0 || 12.2.0 || 12.3.0 || 12.4.0 || 13.0.0 | Not reported |
| github.com/grafana/grafanago | >=2.0.0-beta1,<11.6.15 | Not reported |
| github.com/grafana/grafanago | >=12.0.0,<12.2.9 | Not reported |
| github.com/grafana/grafanago | >=12.3.0,<12.3.7 | Not reported |
| github.com/grafana/grafanago | >=13.0.0,<13.0.2 | Not reported |
| github.com/grafana/grafanago | >=12.4.0,<12.4.4 | Not reported |
| github.com/grafana/grafanago | <1.9.2-0.20260616075434-82ef13993059 | 1.9.2-0.20260616075434-82ef13993059 |
| github.com/grafana/grafanago | >=2.0.0-beta1 | Not reported |
| github.com/grafana/grafanago | >=12.0.0 | Not reported |
| github.com/grafana/grafanago | >=12.3.0 | Not reported |
| github.com/grafana/grafanago | >=13.0.0 | Not reported |
| github.com/grafana/grafanago | >=12.4.0 | Not reported |
| github.com/grafana/grafanago | >=0 <1.9.2-0.20260616075434-82ef13993059 | 1.9.2-0.20260616075434-82ef13993059 |
| github.com/grafana/grafanago | >=0 | Not reported |
| github.com/grafana/grafanago | >=2.0.0-beta1+incompatible | Not reported |
Published upstream
Jun 22, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 25, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jun 22, 2026
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.
Quoted source text, attributed separately from HOL analysis.