CVE-2026-33375Network attack vector

Viewer-triggered container crash via MSSQL restriction bypass

Published Mar 26, 2026 · Updated Mar 26, 2026

Denial of service in Grafana OSS allows remote authenticated users to crash the host container through the MSSQL data source plugin. The plugin's undisclosed logic flaw lets Viewer-role requests bypass API restrictions and allocate memory until the process exhausts available capacity. Viewer access and a configured MSSQL data source are required; successful exploitation interrupts availability by terminating the container.

CVSS severity6.5
Medium
EPSS probability0.43%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in Grafana OSS allows remote authenticated users to crash the host container through the MSSQL data source plugin. The plugin's undisclosed logic flaw lets Viewer-role requests bypass API restrictions and allocate memory until the process exhausts available capacity. Viewer access and a configured MSSQL data source are required; successful exploitation interrupts availability by terminating the container.

The record

CVE
CVE-2026-33375
Published
Mar 26, 2026
Updated
Mar 26, 2026
Vendor
Grafana Labs
Product
Grafana OSS
Classifications
CWE-400, T1499
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 26, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 26, 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=11.6.0 <11.6.14+security-01
  2. Affected versionversion=12.1.0 <12.1.10+security-01
  3. Affected versionversion=12.2.0 <12.2.8+security-01
  4. Affected versionversion=12.3.0 <12.3.6+security-01
  5. Affected versionversion=12.4.0 <12.4.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Grafana Labs · Grafana OSSversion=11.6.0 <11.6.14+security-01; version=12.1.0 <12.1.10+security-01; version=12.2.0 <12.2.8+security-01; version=12.3.0 <12.3.6+security-01; version=12.4.0 <12.4.2

Published CVSS scores

6.5Grafana LabsCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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-400Uncontrolled Resource Consumption
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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