TI-2026-74802 Aliases CVE-2026-9703

Viewer role can create, modify and delete Loki alerting rules

LOW 31CWE-284Published 2026-10-15 · Updated 2026-10-16

Key facts

Attack vector: Network
Privileges required: Low
User interaction: None
Attack complexity: Low
Impact type: Security bypass
Confidentiality · integrity · availability: None · High · Low
Fix status: No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-284.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00195 9th percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Grafana	Grafana Enterprise	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	—	No fix listed	CNA
Grafana	Grafana OSS	12.3.0 – 12.3.8; 12.4.0 – 12.4.5; 8.0.0 – 12.3.0; 13.0.0 – 13.0.3	—	No fix listed	CNA

Grafana Enterprise VendorGrafana Affected 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 Fixed in — No fix listed CNA
Grafana OSS VendorGrafana Affected 12.3.0 – 12.3.8; 12.4.0 – 12.4.5; 8.0.0 – 12.3.0; 13.0.0 – 13.0.3 Fixed in — No fix listed CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPE	Versions	Role	Vendor
cpe:2.3:a:grafana:grafana::::::::	—	—	Grafana

cpe:2.3:a:grafana:grafana:*:*:*:*:*:*:*:* Versions — — ·Grafana

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-16 Threatist record created from CVE-2026-9703
2026-10-16 Priority changed: MEDIUM → LOW
2026-10-16 CISA SSVC decision points changed

References

Advisory 1

https://grafana.com/security/security-advisories/cve-2026-9703

TI-2021-16611 Snapshot authentication bypass in grafana KEVCVSS 3.1CRITICAL 9.8
TI-2021-19604 Grafana path traversal KEVCVSS 3.1HIGH 7.5
TI-2024-08600 Grafana SQL Expressions allow for remote code execution CVSS 4.0CRITICAL 9.4
TI-2023-02931 Authentication bypass by spoofing in Grafana CVSS 3.1CRITICAL 9.8
TI-2020-10491 The avatar feature in Grafana 3.0.1 through 7.0.1 has an SSRF Incorrect Access Control… CVSS 3.1HIGH 8.2
TI-2025-03662 Open redirect in Grafana CVSS 3.1HIGH 7.6

See all 174 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences