Viewer role can create, modify and delete Loki alerting rules (Grafana Grafana Enterprise)
At a glance
- Source
- NVD
- EPSS
- EPSS 0.19 % · percentile 9 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- GRAFANA
- NVD status
- Awaiting Analysis
Description
Grafana's data source proxy did not apply role-based access control to write requests forwarded to Loki data sources. A user holding only the Viewer role on an affected Grafana instance could send POST, PUT and DELETE requests through the proxy to the Loki rules API (/loki/api/v1/rules), allowing them to create, modify and delete Loki alerting rules. Because those rules are stored by Loki rather than by Grafana, the change took effect for every user of that Loki data source, not only for the Viewer who made the request. Exploitation requires an authenticated Viewer account on the Grafana instance and a configured Loki data source; no other privileges are needed. Both Grafana OSS and Grafana Enterprise are affected. The defect is in Grafana's data source proxy; Loki itself is not vulnerable and does not need to be patched.
Weaknesses (CWE)
- CWE-284 — Improper Access Control
References
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | HIGH 7.1 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L | GRAFANA |
| CVSS 3.1 | HIGH 7.1 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L | NVD · security@grafana.com (Secondary) |
European references
- ENISA EUVD · EUVD-2026-102073
- GCVE · GCVE-0-2026-9703
Affected products
| Product | Versions |
|---|---|
| Grafana · Grafana Enterprise | affected 8.0.0 ≤ 11.5.10 ; affected 11.6.0 ≤ 11.6.16 ; affected 12.0.0 ≤ 12.1.10 ; affected 12.2.0 ≤ 12.2.10 ; affected 12.3.0 ≤ 12.3.8 ; affected 12.4.0 ≤ 12.4.5 |
| Grafana · Grafana OSS | affected 12.3.0 ≤ 12.3.8 ; affected 12.4.0 ≤ 12.4.5 ; affected 8.0.0 ≤ 12.3.0 ; affected 13.0.0 ≤ 13.0.3 |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |