NVD / CVE Program· CNA GRAFANA

CVE-2026-33375: Grafana MSSQL Data Source Plugin: Restriction Bypass Leading to OOM DoS

Noroxi assessment

Priority: Monitor (action score 26/100)

The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
Probability of exploitation in the next 30 days: 0.45% (FIRST EPSS).
Anyone who can reach it over the internet can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
Fixed version: Grafana Grafana OSS 11.6.14+security-01, 12.1.10+security-01, 12.2.8+security-01.

Low priority for now. Upgrade to Grafana Grafana OSS 11.6.14+security-01, 12.1.10+security-01, 12.2.8+security-01 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

The Grafana MSSQL data source plugin contains a logic flaw that allows a low-privileged user (Viewer) to bypass API restrictions and trigger a catastrophic Out-Of-Memory (OOM) memory exhaustion, crashing the host container.

MediumCVSS 6.5 · v3.1—No exploit Fix available

Denial of service

Published: Mar 26, 2026
Updated: Aug 27, 2026
EPSS: 0.4% · 39th percentile
CWE: CWE-400

Report tools

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Action score

Monitor

Low priority for now.

CVSS: 26 / 40 · 6.5 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 0 / 30 · 0.4%

CISA SSVC decision

Exploitation: none
Automatable: no
Technical impact: partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD: —
CNA · GRAFANA: 6.5; NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

Not in KEV: no record of exploitation in the wild
No public exploit code on record
A fix has been released

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

Vendor	Product	CPE
grafana	grafana	cpe:2.3:a:grafana:grafana

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

grafana grafana11.6.0 and later · before 11.6.14
grafana grafana12.1.0 and later · before 12.1.10
grafana grafana12.2.0 and later · before 12.2.8
grafana grafana12.3.0 and later · before 12.3.6
grafana grafana12.4.0 and later · before 12.4.2

Versions reported by the vendor

Affected version ranges reported by the assigning authority (GRAFANA). Independent of NVD's CPE analysis and usually ahead of it.

Grafana Grafana OSS
- 11.6.0 and later · before 11.6.14+security-01affected · semver
- 12.1.0 and later · before 12.1.10+security-01affected · semver
- 12.2.0 and later · before 12.2.8+security-01affected · semver
- 12.3.0 and later · before 12.3.6+security-01affected · semver
- 12.4.0 and later · before 12.4.2affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

Ecosystem	Package	Affected range	Fix
Alpine:v3.23	grafana	from 11.6.0 · before 12.2.8-r0	12.2.8-r0
Alpine:v3.24	grafana	from 11.6.0 · before 12.4.3-r0	12.4.3-r0
openSUSE:Leap 16.0	grafana	before 11.6.14+security04-bp160.1.1	11.6.14+security04-bp160.1.1
openSUSE:Tumbleweed	grafana	before 11.6.14+security01-1.1	11.6.14+security01-1.1

Same product

grafana: all records

Other highest-scoring records for the same primary product.

CVE-2021-39226Snapshot authentication bypass in grafanaKEV
89Now
CVE-2021-43798Grafana path traversalKEV
87Now
CVE-2024-9264Grafana SQL Expressions allow for remote code execution
66This week

Published before and after this one in the same product

← EarlierCVE-2026-21725Feb 25, 2026 · Authorization Bypass via TOCTOU in Grafana Datasource Deletion by Name
8Monitor
← EarlierCVE-2026-21724Mar 26, 2026 · Missing Protected-field Authorization in Provisioning Contact Points API
17Monitor
Later →CVE-2026-27877Mar 27, 2026 · Public dashboards discloses all direct mode datasources
30Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / package	Fixed version	Source
Grafana Grafana OSS	11.6.14+security-01	Vendor (CNA)
Grafana Grafana OSS	12.1.10+security-01	Vendor (CNA)
Grafana Grafana OSS	12.2.8+security-01	Vendor (CNA)
Grafana Grafana OSS	12.3.6+security-01	Vendor (CNA)
Grafana Grafana OSS	12.4.2	Vendor (CNA)
alpine:grafana	12.2.8-r0 · Alpine:v3.23	Package registry (OSV)
opensuse:grafana	11.6.14+security01-1.1 · openSUSE:Tumbleweed	Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

CVE-2026-2172058 days apartUnauthenticated DoS: avatar cache leaks goroutines when /avatar/:hash requests time out
30Monitor
CVE-2026-4212788 days apartPre-authentication denial of service in the public dashboard query endpoint
30Monitor
CVE-2026-33382106 days apartDenial of service via unbounded request body size
30Monitor
CVE-2026-8609106 days apartPre-authentication denial of service via the OAuth login route
30Monitor
CVE-2026-283751 days apartGrafana Testdata datasource can issue unbounded memory allocations
26Monitor
CVE-2026-3337848 days apartGrafana Data Source Plugin: DoS (OOM) via Negative Interval Injection in $__timeGroup Macro
26Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

The product’s vendor appears in a public program. Matched by name; verify the scope text in the program.

Technical details

Attack conditions

Anyone who can reach it over the internet can trigger it.
A low-privileged account is enough.
No user action is required.
No special conditions are required; it is repeatable.

If successful

Confidentiality: none
Integrity: none
Availability: high · the service can be disrupted

Attack vector: Network
Attack complexity: Low
Privileges required: Low
User interaction: None
Scope: Unchanged
Confidentiality impact: None
Integrity impact: None
Availability impact: High

Weakness class (CWE)

CWE-400 · Uncontrolled Resource Consumption

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

nvd-secondary

Root cause

Code that parses nested structures sets no depth or size limit. A small input can turn into a disproportionate processing load.

The bug in code

The whole CWE-400 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

1function expand(node) {
2  return node.children.map(expand);
3}

Fixed

1const MAX_DEPTH = 32;
2function expand(node, depth = 0) {
3  if (depth > MAX_DEPTH) throw new Error("too deep");
4  return node.children.map((c) => expand(c, depth + 1));
5}

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Attack patterns (CAPEC)

ATT&CK techniques

Endpoint Denial of ServiceT1499

Change log

Fix✗ → ✓Sep 28, 2026, 10:08 PM UTC

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References

grafana.com/security/security-advisories/cve-2026-33375

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records