Security readout for executives and security teams
Plain-English summary
CVE-2026-27879 is a Grafana availability issue. A logged-in user can run a resample query that causes excessive memory allocation and may crash Grafana through out-of-memory conditions. The published severity is medium because it affects availability, not data confidentiality or integrity.
Executive priority
Prioritize remediation for production or externally reachable Grafana instances because the main business impact is service disruption. This is not described as a data compromise issue, but repeated crashes could affect monitoring visibility and operational response.
Technical view
The issue is classified as CWE-400: uncontrolled resource consumption. The CVSS 3.1 score is 6.5 with network access, low complexity, low privileges, no user interaction, and high availability impact. The source bundle lists Grafana versions including 8.0.0, 12.0.0, 12.2.0, 12.3.0, and 12.4.0 as affected.
Likely exposure
Exposure is most relevant where Grafana is reachable by users who can authenticate and issue queries. Internet-facing Grafana instances increase operational risk, but the CVSS vector requires low privileges. The provided sources do not state affected deployment modes, plugins, or data sources beyond Grafana itself.
Exploitation context
The sources describe a resample query causing out-of-memory crashes. KEV status is false, and the bundle provides no cited evidence of active exploitation or public exploit use. Treat this as a denial-of-service risk requiring authenticated access, not as a confirmed data theft path.
Researcher notes
Evidence is limited to the CVE description, CVSS vector, CWE classification, KEV status, affected version entries, and Grafana advisory reference. No exploit details, patch version, workaround, or affected configuration specifics are included in the provided bundle. Validate against the vendor advisory before final scoping.
Mitigation direction
- Review the Grafana vendor advisory for fixed versions or configuration guidance.
- Upgrade affected Grafana deployments when vendor-supported fixes are identified.
- Restrict Grafana access to trusted networks and authenticated users.
- Monitor Grafana memory usage and crash or restart events.
- Limit unnecessary user privileges for users able to run queries.
Validation and detection
- Inventory Grafana instances and record exact versions.
- Compare deployed versions against the vendor advisory and CVE record.
- Confirm whether untrusted or broad user groups can run queries.
- Review logs for unusual query activity and out-of-memory crashes.
- Track remediation status in vulnerability management tooling.
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 lookupCVE-2026-27879 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-2026-27879CVE 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.