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Vulnerabilities

Vulnerability · CVE-2021-39226

Grafana Authentication Bypass Vulnerability

Published Oct 5, 2021 · catalog updated Jun 16, 2026 · Grafana Labs Grafana

Patch now

CVE-2021-39226 is in the CISA known-exploited catalog, due Sep 15, 2022. Confirm Grafana Labs Grafana against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Gaps on this record

  • No version range is stored. A customer cannot check an installed version against this record.
Severity
High7.3
Known exploitation
CISA KEV and VulnCheck KEV
EPSS
99.93%
Remediation
Remediation guidance
Affected products
cpe fedoraproject/fedora · cpe grafana/grafana · vendor Grafana Labs Grafana

Grafana is an open source data visualization platform. In affected versions unauthenticated and authenticated users are able to view the snapshot with the lowest database key by accessing the literal paths: /dashboard/snapshot/:key, or /api/snapshots/:key. If the snapshot "public_mode" configuration setting is set to true (vs default of false), unauthenticated users are able to delete the snapshot with the lowest database key by accessing the literal path: /api/snapshots-delete/:deleteKey. Regardless of the snapshot "public_mode" setting, authenticated users are able to delete the snapshot with the lowest database key by accessing the literal paths: /api/snapshots/:key, or /api/snapshots-delete/:deleteKey. The combination of deletion and viewing enables a complete walk through all snapshot data while resulting in complete snapshot data loss. This issue has been resolved in versions 8.1.6 and 7.5.11. If for some reason you cannot upgrade you can use a reverse proxy or similar to block access to the literal paths: /api/snapshots/:key, /api/snapshots-delete/:deleteKey, /dashboard/snapshot/:key, and /api/snapshots/:key. They have no normal function and can be disabled without side effects.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe fedoraproject/fedora34
  • cpe fedoraproject/fedora35
  • cpe grafana/grafanaversion unspecified
  • vendor Grafana Labs Grafanaversion unspecified

How to fix CVE-2021-39226

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

CVE-2021-39226 is in the CISA known-exploited catalog, due Sep 15, 2022. Confirm Grafana Labs Grafana against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Which versions are affected?

Compare what you have installed with 34, 35. Apply updates per vendor instructions.

What should an analyst verify?

CWE-287: Improper Authentication; CWE-862: Missing Authorization. EPSS 99.93%. The CISA KEV listing is the exploitation evidence. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Oct 5, 2021 · Catalog

    Detected

    Grafana is an open source data visualization platform. In affected versions unauthenticated and authenticated users are able to view the snapshot with the lowest database key by accessing the literal paths: /dashboard/snapshot/:key, or /api/snapshots/:key. If the snapshot "public_mode" configuration setting is set to true (vs default of false), unauthenticated users are able to delete the snapshot

  2. Aug 25, 2022 · CISA KEV

    Known exploited

    Apply updates per vendor instructions.

  3. Sep 15, 2022 · CISA KEV

    Remediation due

    Apply updates per vendor instructions.

  4. Jun 16, 2026 · Catalog

    Updated

    Grafana is an open source data visualization platform. In affected versions unauthenticated and authenticated users are able to view the snapshot with the lowest database key by accessing the literal paths: /dashboard/snapshot/:key, or /api/snapshots/:key. If the snapshot "public_mode" configuration setting is set to true (vs default of false), unauthenticated users are able to delete the snapshot

Sources

  • CISA KEVConfirmed exploitationCVE-2021-39226

    Grafana contains an authentication bypass vulnerability that allows authenticated and unauthenticated users to view and delete all snapshot data, potentially resulting in complete snapshot data loss.

    cisa.gov
  • CVE.orgVulnerability recordCVE-2021-39226

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2021-39226

    30-day exploitation probability 99.9%

    first.org
  • NIST NVDVulnerability recordCVE-2021-39226

    Grafana is an open source data visualization platform. In affected versions unauthenticated and authenticated users are able to view the snapshot with the lowest database key by accessing the literal paths: /dashboard/snapshot/:key, or /api/snapshots/:key. If the snapshot "public

    nvd.nist.gov
  • VulnCheck KEVConfirmed exploitationCVE-2021-39226

    Grafana contains an authentication bypass vulnerability that allows authenticated and unauthenticated users to view and delete all snapshot data, potentially resulting in complete snapshot data loss.

    vulncheck.com

References

Freshness

Last verified in this catalog Oct 17, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.