Security readout for executives and security teams
Plain-English summary
A Grafana Viewer may bypass restrictions in the MSSQL data source plugin and exhaust host-container memory, causing Grafana downtime. The issue affects availability, not confidentiality or data integrity, based on the supplied evidence.
Executive priority
Prioritize affected production or business-critical Grafana deployments because exploitation could interrupt monitoring during operational or security incidents. Address externally reachable or broadly shared Viewer access first, while recognizing that the supplied evidence does not show active exploitation.
Technical view
CVE-2026-33375 is a CWE-400 resource-exhaustion flaw reachable over the network with low privileges and no user interaction. A Viewer can bypass API restrictions and trigger an out-of-memory condition that crashes the host container. CVSS 3.1 is 6.5, with high availability impact.
Likely exposure
Exposure requires Grafana OSS running a listed affected version, use of the MSSQL data source plugin, and an account with Viewer privileges. The bundle lists versions 11.6.0, 12.1.0, 12.2.0, 12.3.0, and 12.4.0; broader version ranges are not established.
Exploitation context
The supplied record is not in CISA KEV, and no cited source establishes active exploitation or a public exploit. Exploitation nevertheless requires only network access and low privileges according to the CVSS vector.
Researcher notes
The bundle identifies an API-restriction logic flaw resulting in unbounded resource consumption, but provides no endpoint details, affected version ranges, fixed versions, or confirmed exploitation. Treat only the five explicitly listed versions as established here and consult the vendor advisory for current remediation details.
Mitigation direction
- Review Grafana's advisory for vendor-approved remediation and applicable fixed versions.
- Reduce untrusted Viewer access to affected Grafana instances while remediation is pending.
- Limit access to the MSSQL data source where operationally feasible.
- Monitor container memory and restart events to detect attempted or accidental exhaustion.
Validation and detection
- Inventory Grafana OSS versions and identify instances matching the five listed versions.
- Confirm whether each potentially affected instance uses the MSSQL data source plugin.
- Review Viewer accounts and determine which users can reach affected instances.
- Check monitoring records for abnormal memory growth, OOM termination, or repeated container restarts.
- After remediation, confirm the deployed version against Grafana's current advisory.
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.
Uncontrolled Resource Consumption
Uncontrolled Resource Consumption represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.