CVE-2026-9703Viewer role can create, modify and delete Loki alerting rules
Updated under an hour ago ()
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It affects Grafana Enterprise and 1 other product. Add what you run to find out whether that includes you.
EPSS puts the chance of exploitation in the next 30 days at 0.19%, higher than 9% of scored CVEs.
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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.
- CVSS
- 7.1 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L
- Weakness (CWE)
- CWE-284
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- 0.19% (percentile 9)
- Assigned by
- GRAFANA
- NVD analysis
- Awaiting Analysis
- Record last updated
- Oct 16, 2026
- First seen by InfoSec Signals
- Oct 15, 2026
Affected products
Grafana Grafana Enterprise grafana:enterprise (from the name) | from 8.0.0 through 11.5.10; from 11.6.0 through 11.6.16; from 12.0.0 through 12.1.10; from 12.2.0 through 12.2.10; from 12.3.0 through 12.3.8; from 12.4.0 through 12.4.5; from 13.0.0 through 13.0.3 | CNA record |
Grafana Grafana OSS grafana:oss (from the name) | from 12.3.0 through 12.3.8; from 12.4.0 through 12.4.5; from 8.0.0 through 12.3.0; from 13.0.0 through 13.0.3 | CNA record |
References
- https://grafana.com/security/security-advisories/cve-2026-9703vendor-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.