Known exploited · Grafana Labs
CVE-2021-39226: Grafana Authentication Bypass Vulnerability
What it is
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.
- Vendor
- Grafana Labs
- Product
- Grafana
- Added to KEV
- August 25, 2022
- CISA due date
- September 15, 2022
- Ransomware use
- Unknown
- Weakness
- CWE-287: Improper Authentication
What CISA requires
Apply updates per vendor instructions.
Forensic triage
No
What to do now
- Find every instance of Grafana you run, including the forgotten ones, and check its version against the vendor advisory.
- Apply the vendor's fix or mitigation, before September 15, 2022 if you are bound by CISA's deadline, sooner if it faces the internet.
- Assume it was tried against you already: look for signs of exploitation from the date it was added, not from the day you patched.
References
H2 Security
Not sure you are clear?
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Start freeSource: CISA Known Exploited Vulnerabilities Catalog (public domain), catalog version 2026.10.01.