Grafana pre-auth DoS through arbitrarily large input to public dashboard query handler

MITRE NVD CVE.ORG JSON API Print: PDF PDF

Summary

CVECVE-2026-42127
StatePUBLISHED
AssignerGRAFANA
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-06-22 18:16:37 UTC
Updated2026-06-30 14:49:20 UTC
DescriptionThe public dashboard query endpoint does not limit request body size before processing, allowing unauthenticated attackers to trigger excessive memory allocation by sending arbitrarily large JSON payloads. This can lead to denial of service through memory exhaustion. No valid dashboard access token or authentication is required to exploit this vulnerability.

Risk And Classification

Primary CVSS: v3.1 7.5 HIGH from [email protected]

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

EPSS: 0.004320000 probability, percentile 0.346880000 (date 2026-07-03)

Problem Types: CWE-770 | CWE-770 CWE-770 Allocation of Resources Without Limits or Throttling

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
3.1CNADECLARED7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

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

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Grafana Grafana All All All All
Application Grafana Grafana All All All All
Application Grafana Grafana All All All All
Application Grafana Grafana All All All All
Application Grafana Grafana All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Grafana Grafana Enterprise affected 11.6.14 semver Not specified
CNA Grafana Grafana Enterprise affected 12.2.8 semver Not specified
CNA Grafana Grafana Enterprise affected 12.3.6 semver Not specified
CNA Grafana Grafana Enterprise affected 12.4.3 semver Not specified
CNA Grafana Grafana Enterprise affected 13.0.1 semver Not specified
CNA Grafana Grafana OSS affected 11.6.0 11.6.14 semver Not specified
CNA Grafana Grafana OSS affected 12.2.0 12.2.8 semver Not specified
CNA Grafana Grafana OSS affected 12.3.0 12.3.6 semver Not specified
CNA Grafana Grafana OSS affected 12.4.0 12.4.3 semver Not specified
CNA Grafana Grafana OSS affected 13.0.0 13.0.1 semver Not specified

References

ReferenceSourceLinkTags
grafana.com/security/security-advisories/cve-2026-42127 [email protected] grafana.com Broken Link
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Charlie Lewis (en)

© CVE.report 2026 |

Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. It is the responsibility of user to evaluate the accuracy, completeness or usefulness of any information, opinion, advice or other content. EACH USER WILL BE SOLELY RESPONSIBLE FOR ANY consequences of his or her direct or indirect use of this web site. ALL WARRANTIES OF ANY KIND ARE EXPRESSLY DISCLAIMED. This site will NOT BE LIABLE FOR ANY DIRECT, INDIRECT or any other kind of loss.

CVE, CWE, and OVAL are registred trademarks of The MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. This site includes MITRE data granted under the following license.

Free CVE JSON API cve.report/api

CVE.report and Source URL Uptime Status status.cve.report