Grafana Labs · Grafana
CVE-2021-39226
Snapshot authentication bypass in grafana
What it is
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.
CISA: 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.
What to do
Apply updates per vendor instructions.
Deadline for US federal agencies: September 15, 2022
- Added to the CISA list
- August 25, 2022
- Published
- October 5, 2021
- Severity
- Critical 9.8 CVSS 3.1
- Chance of attacks in the next 30 days (EPSS)
- 99.9% in the top 0.1% of all known vulnerabilities
- Weakness
- CWE-287
- More details
- NVD · CVE.org · CISA
All references (8)
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/E6ANHRDBXQT6…
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DCKBFUSY6V4V…
- https://github.com/grafana/grafana/security/advisories/GHSA-69j6-29vr-p3j9
- https://github.com/grafana/grafana/commit/2d456a6375855364d098ede379438bf7f0667269
- https://grafana.com/docs/grafana/latest/release-notes/release-notes-7-5-11/
- https://grafana.com/docs/grafana/latest/release-notes/release-notes-8-1-6/
- http://www.openwall.com/lists/oss-security/2021/10/05/4
- https://security.netapp.com/advisory/ntap-20211029-0008/
More exploited flaws from Grafana Labs
| Added | Vulnerability | Product | Severity | Attack chance |
|---|---|---|---|---|
| Oct 9, 2025 | Path Traversal | Grafana | High 7.5 | 89% |
Sources: Known Exploited Vulnerabilities (CISA, public domain), CVE records (cve.org) and EPSS (FIRST). The chance of attacks is the EPSS estimate that someone will try to exploit the flaw in the next 30 days.