Answer in brief
CVE-2026-9703 records a High severity (CVSS 7.1) vulnerability in Viewer role can create, modify and delete Loki alerting rules. The current sources do not mark it as known exploited. The current feed maps Grafana/Grafana Enterprise (generic), Grafana/Grafana OSS (generic). 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 7.1. 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 Enterprise (generic), Grafana/Grafana OSS (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Grafana/Grafana Enterprisegeneric | >=8.0.0 <=11.5.10 || >=11.6.0 <=11.6.16 || >=12.0.0 <=12.1.10 || >=12.2.0 <=12.2.10 || >=12.3.0 <=12.3.8 || >=12.4.0 <=12.4.5 || >=13.0.0 <=13.0.3 | Not reported |
| Grafana/Grafana OSSgeneric | >=12.3.0 <=12.3.8 || >=12.4.0 <=12.4.5 || >=8.0.0 <=12.3.0 || >=13.0.0 <=13.0.3 | Not reported |
Published upstream
Oct 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 16, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Oct 15, 2026
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.
Quoted source text, attributed separately from HOL analysis.