Security readout for executives and security teams
Plain-English summary
CVE-2026-33375 is a Grafana OSS availability issue. A Viewer-level user may bypass restrictions in the MSSQL data source plugin and consume enough memory to crash the host container. The sources indicate service disruption risk, not data theft or tampering.
Executive priority
Treat this as a moderate-priority availability risk. It is most urgent for internet-accessible or business-critical Grafana deployments where many Viewer users can access MSSQL dashboards. Patch or apply vendor guidance during the next practical maintenance window, sooner for critical monitoring systems.
Technical view
The issue is a CWE-400 resource exhaustion flaw in Grafana's MSSQL data source plugin. CVSS 3.1 is 6.5: network reachable, low complexity, low privileges required, no user interaction, and high availability impact only. Listed affected Grafana OSS versions are 11.6.0, 12.1.0, 12.2.0, 12.3.0, and 12.4.0.
Likely exposure
Exposure is likely limited to Grafana OSS instances on the listed versions that use or expose the MSSQL data source plugin to Viewer-level users. The bundle marks default status as unaffected, so do not assume other versions or Grafana products are affected without vendor confirmation.
Exploitation context
The source bundle does not report active exploitation, and KEV status is false. Exploitation requires authenticated low-privileged access, reportedly Viewer level. The practical outcome is denial of service through memory exhaustion and container crash, not confidentiality or integrity compromise.
Researcher notes
Evidence is limited to the CVE bundle and Grafana advisory reference. No exploit details, patched version, or broader product impact are provided here. Avoid expanding scope beyond the listed Grafana OSS versions unless the vendor advisory confirms it.
Mitigation direction
- Review the Grafana advisory for fixed versions or vendor-approved remediation.
- Prioritize upgrades for affected Grafana OSS versions using the MSSQL data source plugin.
- Limit Viewer access to trusted users until vendor remediation is applied.
- Monitor Grafana containers for memory spikes, OOM kills, and unexpected restarts.
- Check whether MSSQL data sources are necessary and restrict exposure where feasible.
Validation and detection
- Inventory Grafana OSS versions across production and internal environments.
- Identify instances using the MSSQL data source plugin.
- Review Grafana user roles for Viewer accounts with access to MSSQL data sources.
- Check container logs and runtime metrics for OOM-related crashes.
- Compare installed versions against the vendor advisory before closing remediation.
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
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupContainer behavior lookup
The affected technology mentions containers, so container-specific ATT&CK technique review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2026-33375 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-2026-33375CVE 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.