Security readout for executives and security teams
Plain-English summary
Grafana’s Testdata data source can be abused by a low-privileged network user to consume unbounded memory, potentially crashing the service. The documented impact is loss of availability, not data theft or modification. Exact affected ranges and fixed releases are not supplied in the source bundle.
Executive priority
Treat this as a moderate availability risk. Prioritize internet-accessible or operationally critical Grafana deployments where low-privileged users can access Testdata. Validate exposure promptly and follow vendor remediation guidance; emergency response is not supported absent exploitation evidence or repeated crashes.
Technical view
CVE-2026-28375 is a CWE-400 resource-consumption flaw with CVSS 3.1 score 6.5. Crafted use of Grafana’s Testdata data source can cause unbounded memory allocation and an out-of-memory crash. The vector indicates network access, low attack complexity, low privileges, no user interaction, and availability-only impact.
Likely exposure
Exposure is most plausible where the Testdata data source is available to low-privileged users over a network. The bundle lists Grafana versions 8.1.0, 12.0.0, 12.2.0, 12.3.0, and 12.4.0, but does not establish complete affected ranges.
Exploitation context
The bundle provides no evidence of active exploitation, and the CVE is not identified as CISA KEV. Exploitation requires low privileges according to the CVSS vector. Successful abuse could repeatedly exhaust memory and disrupt dashboards, alerting, or other Grafana-dependent operations.
Researcher notes
The documented weakness is CWE-400 and affects availability only. The supplied version data appears incomplete for determining ranges, and no fixed versions or patches are named. Avoid inferring that every release between listed versions is affected; use the vendor advisory as the authoritative remediation reference.
Mitigation direction
- Review Grafana’s advisory for confirmed affected versions, fixed releases, and vendor-recommended mitigations.
- Upgrade affected deployments according to current Grafana guidance when an applicable fixed release is identified.
- Restrict low-privileged access to the Testdata data source where operationally feasible.
- Apply memory limits and service recovery controls to reduce outage duration.
Validation and detection
- Inventory deployed Grafana versions and compare them with the vendor advisory’s exact affected ranges.
- Determine whether the Testdata data source is enabled or accessible to low-privileged accounts.
- Review authorization policies governing data-source creation, configuration, and querying.
- Check monitoring and logs for out-of-memory events, abnormal memory growth, or repeated Grafana restarts.
- Confirm deployed remediation against Grafana’s advisory after upgrading or applying mitigations.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-400: Exact CWE lookup
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Open ATT&CK lookupCVE-2026-28375 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 6.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
SSVC decision data
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H2.83.6GRAFANAVulnerability scoring details
Base CVSS 3.1 score
6.5MediumVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- https://grafana.com/security/security-advisories/cve-2026-28375CVE reference, GRAFANA · vendor-advisory
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Uncontrolled Resource Consumption
Uncontrolled Resource Consumption represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.