Security readout for executives and security teams
Plain-English summary
An authenticated Grafana user with limited privileges can submit a resampling query that consumes unbounded memory, potentially crashing the service. The principal business impact is dashboard and monitoring unavailability; the supplied evidence does not indicate data theft or modification.
Executive priority
Treat as a scheduled, prompt remediation for exposed or business-critical Grafana systems. Prioritize environments granting query capabilities to many users or where Grafana availability supports operational monitoring. Escalate urgency if memory exhaustion or unexplained restarts are observed.
Technical view
CVE-2026-27879 is a CWE-400 resource-consumption flaw in Grafana query resampling. It is network-accessible, requires low privileges, needs no user interaction, and can cause out-of-memory termination. CVSS 3.1 is 6.5 (AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H).
Likely exposure
Potential exposure exists where the listed Grafana versions—8.0.0, 12.0.0, 12.2.0, 12.3.0, or 12.4.0—are deployed and low-privileged users can issue resampling queries. The bundle does not provide complete affected ranges, deployment prerequisites, or fixed versions; confirm applicability with Grafana's advisory.
Exploitation context
The source bundle reports no CISA KEV listing and provides no evidence of active exploitation or a public exploit. Exploitation requires authenticated low-level access but has low stated complexity. Successful abuse affects availability through memory exhaustion, potentially enabling repeated denial of service.
Researcher notes
The supplied version list appears discrete and does not establish complete vulnerable ranges. No patch version, workaround, root-cause detail, or exploitation telemetry is included. Safe assessment should focus on version confirmation, authorization paths to resampling queries, memory behavior, and vendor guidance without testing denial-of-service conditions in production.
Mitigation direction
- Review Grafana's advisory for applicable fixed versions and upgrade guidance.
- Restrict query and dashboard creation privileges to trusted users until remediation is confirmed.
- Monitor Grafana memory consumption, restarts, and out-of-memory events for abnormal patterns.
- Apply resource limits and service recovery controls where operationally appropriate.
Validation and detection
- Inventory Grafana instances and record their exact versions.
- Compare each version and configuration against Grafana's current advisory.
- Verify which authenticated roles can submit or modify resampling queries.
- Review logs and monitoring for unexplained memory spikes, OOM events, or restarts.
- After remediation, confirm the deployed version is outside Grafana's affected range.
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.
Uncontrolled Resource Consumption
Uncontrolled Resource Consumption represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.