CVE-2026-28381Network attack vector

Authenticated arbitrary file read and write via GET/PUT

Published Jun 22, 2026 · Updated Jun 22, 2026

Improper access control in Grafana Labs Snowflake data source 1.14.7 through 1.14.12 allows remote authenticated users to read or write files. The query execution path accepts Snowflake GET and PUT commands without restricting their file-transfer operations between Grafana and Snowflake. Access to run queries against the configured data source is required; transferred files expose or alter endpoint data and support privilege escalation when writable files influence privileged execution.

CVSS severity9.6
Critical
EPSS probability0.35%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper access control in Grafana Labs Snowflake data source 1.14.7 through 1.14.12 allows remote authenticated users to read or write files. The query execution path accepts Snowflake GET and PUT commands without restricting their file-transfer operations between Grafana and Snowflake. Access to run queries against the configured data source is required; transferred files expose or alter endpoint data and support privilege escalation when writable files influence privileged execution.

The record

CVE
CVE-2026-28381
Published
Jun 22, 2026
Updated
Jun 22, 2026
Vendor
Grafana Labs
Product
Snowflake data source
Classifications
CWE-284, T1105
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 22, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 22, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1.14.7 <=1.14.12

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Grafana Labs · Snowflake data sourceversion=1.14.7 <=1.14.12

Published CVSS scores

9.6Grafana LabsCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N
8.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-284Improper Access Control
T1105Ingress Tool Transfer

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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