CVE-2021-39226: Grafana Authentication Bypass Vulnerability

CISA Known Exploited Vulnerabilities

Name

Grafana Authentication Bypass Vulnerability

Vendor

Grafana Labs

Product

Grafana

Added to the catalog

2022-08-25

Due date for US federal agencies

2022-09-15

Weaknesses

CWE-287

Catalog version

2026.10.30

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.

Required action (CISA)

Apply updates per vendor instructions.

Ransomware use: CISA does not mark known use of this vulnerability in ransomware campaigns.

Links in CISA's notes

• https://grafana.com/blog/2021/10/05/grafana-7.5.11-and-8.1.6-released-with-critical-security-fix/
• https://nvd.nist.gov/vuln/detail/CVE-2021-39226

Read on 2026-11-02T23:39:54.475Z under licence cisa-kev-cc0@b0067899 from https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json

NVD analysis

Status

Analyzed

Published

2021-10-05T18:15:07.947

Last modified

2026-06-17T04:03:21.130

Weaknesses

CWE-287, CWE-862

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.

References

• http://www.openwall.com/lists/oss-security/2021/10/05/4 (Mailing List, Third Party Advisory)
• https://github.com/grafana/grafana/commit/2d456a6375855364d098ede379438bf7f0667269 (Patch)
• https://github.com/grafana/grafana/security/advisories/GHSA-69j6-29vr-p3j9 (Exploit, Mitigation, Vendor Advisory)
• https://grafana.com/docs/grafana/latest/release-notes/release-notes-7-5-11/ (Release Notes)
• https://grafana.com/docs/grafana/latest/release-notes/release-notes-8-1-6/ (Release Notes)
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DCKBFUSY6V4VU5AQUYWKISREZX5NLQJT/ (Broken Link)
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/E6ANHRDBXQT6TURLP2THM26ZPDINFBEG/ (Broken Link)
• https://security.netapp.com/advisory/ntap-20211029-0008/ (Third Party Advisory)
• http://www.openwall.com/lists/oss-security/2021/10/05/4 (Mailing List, Third Party Advisory)
• https://github.com/grafana/grafana/commit/2d456a6375855364d098ede379438bf7f0667269 (Patch)
• https://github.com/grafana/grafana/security/advisories/GHSA-69j6-29vr-p3j9 (Exploit, Mitigation, Vendor Advisory)
• https://grafana.com/docs/grafana/latest/release-notes/release-notes-7-5-11/ (Release Notes)
• https://grafana.com/docs/grafana/latest/release-notes/release-notes-8-1-6/ (Release Notes)
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DCKBFUSY6V4VU5AQUYWKISREZX5NLQJT/ (Broken Link)
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/E6ANHRDBXQT6TURLP2THM26ZPDINFBEG/ (Broken Link)
• https://security.netapp.com/advisory/ntap-20211029-0008/ (Third Party Advisory)
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-39226 (US Government Resource)

This product uses the NVD API but is not endorsed or certified by the NVD.

Read on 2026-11-02T23:41:59.479Z under licence nvd-api-terms-of-use@ff2a5288 from https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2021-39226

CVE record

Title (CNA)

Snapshot authentication bypass in grafana

Assigner

GitHub_M

State

PUBLISHED

Published

2021-10-05T17:30:11.000Z

Updated

2025-10-21T23:25:30.669Z

Problem types

CWE-287: Improper Authentication

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.

References

• 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/
• [oss-security] 20211005 CVE-2021-39226 Grafana snapshot authentication bypass
• FEDORA-2021-dd83dc8b0b
• https://security.netapp.com/advisory/ntap-20211029-0008/
• FEDORA-2021-01588ab0bf

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Also known as / affected packages

Defensive techniques (MITRE D3FEND)

D3FEND maps these defensive techniques to the weakness (CWE) that NVD lists for this CVE, through the digital artifacts the weakness affects. D3FEND does not say they stop this vulnerability.

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