Grafana OSS up to 13.0.1+security-00 __timeGroup denial of service

CVSS Meta Temp Score
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CTI Interest Score
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5.3$0-$5k0.00

Summaryinfo

A vulnerability classified as problematic has been found in Grafana OSS. This issue affects the function __timeGroup. The manipulation leads to denial of service. This vulnerability is traded as CVE-2026-33378. It is possible to initiate the attack remotely. There is no exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in Grafana OSS. This issue affects the function __timeGroup. The manipulation with an unknown input leads to a denial of service vulnerability. Using CWE to declare the problem leads to CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. Impacted is availability. The summary by CVE is:

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.

It is possible to read the advisory at grafana.com. The identification of this vulnerability is CVE-2026-33378 since 03/19/2026. The exploitation is known to be easy. The attack may be initiated remotely. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1499 according to MITRE ATT&CK.

The vulnerability scanner Nessus provides a plugin with the ID 316447 (Linux Distros Unpatched Vulnerability : CVE-2026-33378), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 11.6.14+security-04, 12.2.8+security-04, 12.3.6+security-04, 12.4.3+security-02 or 13.0.1+security-01 eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (316447), EUVD (EUVD-2026-30144) and CERT Bund (WID-SEC-2026-1546). Be aware that VulDB is the high quality source for vulnerability data.

Affected

  • Grafana Grafana

Productinfo

Vendor

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.4
VulDB Meta Temp Score: 5.3

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 6.5
CNA Vector (GRAFANA): 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Denial of service
CWE: CWE-404
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 316447
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2026-33378

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: OSS 11.6.14+security-04/12.2.8+security-04/12.3.6+security-04/12.4.3+security-02/13.0.1+security-01

Timelineinfo

03/19/2026 CVE reserved
05/14/2026 +55 days Advisory disclosed
05/14/2026 +0 days VulDB entry created
08/12/2026 +90 days VulDB entry last update

Sourcesinfo

Advisory: grafana.com
Status: Confirmed

CVE: CVE-2026-33378 (🔒)
GCVE (CVE): GCVE-0-2026-33378
GCVE (VulDB): GCVE-100-363719
EUVD: 🔒
CERT Bund: WID-SEC-2026-1546 - Grafana: Mehrere Schwachstellen

Entryinfo

Created: 05/14/2026 05:24
Updated: 08/12/2026 16:08
Changes: 05/14/2026 05:24 (64), 05/16/2026 02:47 (7), 05/23/2026 18:20 (2), 08/12/2026 16:08 (1)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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