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Fencer Vulns
high 7.1

CVE-2026-9703 json

Viewer role can create, modify and delete Loki alerting rules

published 2026-10-15 24 d ago modified 2026-10-22 17 d ago also BIT-grafana-2026-9703 , EUVD-2026-102073

cvss
7.1
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 9%
public exploits
0
none known

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.

Patch / fix

  • bitnami grafana 12.3.9, 12.4.6, 13.0.4
  • grafana grafana_enterprise 12.3.9, 12.4.6, 13.0.4
  • grafana grafana 12.3.9, 12.4.6, 13.0.4
  • distribution openSUSE Tumbleweed 3.1.2-3.1

opensuse advisories openSUSE-SU-2026:12283-1

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
23 d ago

Exploit prediction

0.19% chance of exploitation in the next 30 days, higher than 9% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 7.1 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L
OSV 3.1 7.1 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L

Affected packages

ecosystem package affected fixed in
bitnami grafana
>=8.0.0, <12.3.9
>=12.4.0, <12.4.6
>=13.0.0, <13.0.4
12.3.9
12.4.6
13.0.4

Affected products

  • Grafana Grafana Enterprise
  • Grafana Grafana OSS

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.