Security readout for executives and security teams
Plain-English summary
CVE-2026-27880 is a denial-of-service issue in Grafana’s OpenFeature feature toggle evaluation endpoint. The endpoint can read unbounded input into memory, potentially crashing Grafana from out-of-memory conditions. This primarily threatens service availability, not data confidentiality or integrity.
Executive priority
Treat as high priority for Grafana environments that support business monitoring, incident response, or customer-facing operations. The main risk is outage, which can blind operations teams or disrupt dashboards and alerting.
Technical view
Affected Grafana versions listed are v12.1.0, v12.2.0, v12.3.0, and v12.4.0. The CVSS 3.1 score is 7.5: network-accessible, low complexity, no privileges, no user interaction, availability impact high. The source bundle maps this to CWE-125 and CWE-770.
Likely exposure
Exposure is most relevant where affected Grafana versions are reachable over a network and the OpenFeature evaluation endpoint is accessible. Internet-facing Grafana deployments should be prioritized, followed by internal shared monitoring platforms.
Exploitation context
The source bundle does not show CISA KEV listing or confirmed active exploitation. The issue is plausibly easy to trigger because CVSS marks it network-accessible, low complexity, unauthenticated, and requiring no user interaction.
Researcher notes
Evidence is limited to the provided CVE metadata and referenced public advisories. No exploit details, proof-of-concept status, fixed version, or workaround is included in the source bundle. Avoid assuming impact beyond availability unless vendor guidance adds detail.
Mitigation direction
- Identify Grafana instances running v12.1.0 through v12.4.0.
- Review Grafana’s advisory for fixed versions or vendor-recommended mitigations.
- Reduce external exposure to Grafana where business operations allow.
- Apply network access controls for Grafana management and evaluation endpoints.
- Monitor Grafana availability and memory pressure until remediated.
Validation and detection
- Inventory Grafana versions across production and non-production environments.
- Confirm whether the OpenFeature evaluation endpoint is enabled or reachable.
- Check vendor advisory and Red Hat entries for updated remediation status.
- Review logs and monitoring for abnormal memory exhaustion or crashes.
- Document exceptions for affected systems not immediately remediated.
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-125: 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 lookupCWE-770: 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-2026-27880 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
- High
- CVSS
- 7.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/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
2 official scoresWe 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:N/UI:N/S:U/C:N/I:N/A:H3.93.6GRAFANACVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H3.93.6redhat-SADPVulnerability scoring details
Base CVSS 3.1 score
7.5HighVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Base CVSS 3.1 score
7.5HighVector: CVSS:3.1/AV:N/AC:L/PR:N/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.
- ADP timelineredhat-SADP
Made public.
- CVE publishedCVE Program
The CVE record was published.
- ADP timelineredhat-SADP
Reported to Red Hat.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
- 2026-03-27T15:03:43.019Z: Reported to Red Hat.
- 2026-03-27T14:12:20.075Z: Made public.
Source materials
- CVE List V5 sourceCVE List V5
- https://grafana.com/security/security-advisories/cve-2026-27880CVE reference, GRAFANA · vendor-advisory
- https://access.redhat.com/security/cve/CVE-2026-27880CVE reference, redhat-SADP · vdb-entry, x_refsource_REDHAT
- RHBZ#2452295CVE reference, redhat-SADP · issue-tracking, x_refsource_REDHAT
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-27880.jsonCVE reference, redhat-SADP · x_sadp-csaf-vex
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.
Out-of-bounds Read
Out-of-bounds Read represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.
Allocation of Resources Without Limits or Throttling
Allocation of Resources Without Limits or Throttling represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.