Is CVE-2026-33378 in the CISA KEV catalog?

No. CVE-2026-33378 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2026-33378?

CVE-2026-33378 has a CVSS v3 base score of 6.5 (MEDIUM).

What is the EPSS score for CVE-2026-33378?

CVE-2026-33378 has an EPSS score of 0.33% (25th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2026-33378?

Upgrade GrafanaEnterprise to 12.2.8 or later. Fixes are available for 2 affected products.

CVE & CISA-KEV Catalog

CVE-2026-33378

MEDIUM

6.5

CVSS v3

NVD

Description

Using the $__timeGroup macro, one can achieve an OOM by overloading the server. This requires a SQL datasource. If the server is set up to auto-restart, the impact is minimal or non-existent, as the attack can take upwards of half an hour to crash the server.

CWE-400Resource Exhaustion

How to fix

Remediation Available

GrafanaEnterpriseWindows application

Affected:12.0.0 12.2.8Fixed in:12.2.8Grafana Labs

Affected:8.0.0 11.6.14Fixed in:11.6.14Grafana Labs

Affected:12.3.0 12.3.6Fixed in:12.3.6Grafana Labs

Affected:12.4.0 12.4.3Fixed in:12.4.3Grafana Labs

GrafanaOSSWindows application

Affected:12.0.0 12.2.8Fixed in:12.2.8Grafana Labs

Affected:12.3.0 12.3.6Fixed in:12.3.6Grafana Labs

Affected:12.4.0 12.4.3Fixed in:12.4.3Grafana Labs

Affected:8.0.0 11.6.14Fixed in:11.6.14Grafana Labs

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

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

Exploit Intelligence

0.33%probability of exploitation in 30 days

25thpercentile

Low risk: more likely to be exploited than 25% of all known CVEs.

References

Vendor Advisory1

grafana.com

Related Vulnerabilities

Other CWE-400 (Resource Exhaustion) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2023-44487	High	7.5	100%	KEV	Fix
CVE-2021-44228	Critical	10.0	100%	KEV + Ransom	Fix
CVE-2011-3192	High	7.8	99%	-	Fix
CVE-2019-11478	Medium	5.3	95%	-	Fix
CVE-2024-25617	Medium	5.3	89%	-	Fix
CVE-2018-1000115	High	7.5	89%	-	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-05-28.