PatchSiren

PatchSiren cyber security CVE debrief

CVE-2026-27877 Grafana CVE debrief

CVE-2026-27877 is a Grafana information-disclosure issue affecting public dashboards that use direct data-sources. According to the CVE description, passwords for direct data-sources can be exposed even when those data-sources are not actually used in the dashboards. Grafana states that proxied data-sources are not exposed and recommends converting direct data-sources to proxied data-sources wherever possible.

Vendor
Grafana
Product
Unknown
CVSS
MEDIUM 6.5
CISA KEV
Not listed in stored evidence
Original CVE published
2026-03-27
Original CVE updated
2026-07-15
Advisory published
2026-03-27
Advisory updated
2026-07-15

Who should care

Grafana administrators, security teams, and operators who publish dashboards externally or use direct data-sources in Grafana deployments should review this CVE. Environments with credentials tied to direct data-sources are the primary concern.

Technical summary

NVD lists CVSS 3.1 as AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N (6.5 MEDIUM). The vulnerability is described as exposing direct data-source passwords in public dashboards, while proxied data-sources are not exposed. NVD marks the weakness as NVD-CWE-noinfo with a secondary CWE-312 classification. NVD vulnerable version ranges include versions before 9.3.0, and specific affected release windows for later branches: 11.6.14 through before 12.0.0, 12.1.10 through before 12.2.0, 12.2.8 through before 12.3.0, and 12.3.6 through before 12.4.0.

Defensive priority

Prioritize remediation if you expose Grafana dashboards publicly or rely on direct data-sources. The issue is confidentiality-impacting and affects credential exposure, so fix or mitigate before broad dashboard exposure continues.

Recommended defensive actions

  • Identify any public dashboards that use direct data-sources and treat the associated credentials as exposed.
  • Upgrade Grafana to a fixed release outside the affected version ranges for your release line.
  • Convert direct data-sources to proxied data-sources wherever operationally possible.
  • Review and rotate any passwords associated with impacted direct data-sources.
  • Validate your current Grafana version against the affected ranges listed by NVD and the Grafana advisory.

Evidence notes

Summary is grounded in the CVE description, NVD metadata, and the Grafana vendor advisory reference. Evidence available in the supplied corpus supports exposure of direct data-source passwords, lack of exposure for proxied data-sources, the CVSS vector, and the affected version ranges. The NVD entry was last modified on 2026-05-10; the CVE was published on 2026-03-27.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-27877 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-27877

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-27877 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-27877

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.