CVE-2021-39226

CRITICAL9.8

CISA KEV

Published 2021-10-05 · Updated 2026-06-17 · Source security-advisories@github.com

Summary

CVE-2021-39226 is a critical-severity (CVSS 9.8) vulnerability in Grafana Labs Grafana. CISA added it to the Known Exploited Vulnerabilities catalog on August 25, 2022, which means exploitation in the wild has been confirmed; US federal agencies had to remediate it by September 15, 2022. CISA does not currently list it as used in ransomware campaigns. Grafana Labs has 2 vulnerabilities in the KEV catalog, 0 of them linked to ransomware.

All 2 known-exploited Grafana Labs vulnerabilities →

Description

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.

CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CWE-287CWE-862

CISA Known-Exploited Vulnerability

Product: Grafana Labs — Grafana

Name: Grafana Authentication Bypass Vulnerability

Date added: 2022-08-25 · Due: 2022-09-15

Required action: Apply updates per vendor instructions.

References

View on NVD

More exploited Grafana Labs vulnerabilities

Most recently added to CISA KEV

CVE-2021-43798
Grafana — Grafana Path Traversal Vulnerability
added 2025-10-09

View all →

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