CVE-2021-39226 (GCVE-0-2021-39226)

Vulnerability from cvelistv5 – Published: 2021-10-05 17:30 – Updated: 2025-10-21 23:25
VLAI? CISA KEV
Title
Snapshot authentication bypass in grafana
Summary
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.
Severity ?
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE
  • CWE-287 - Improper Authentication
Assigner
References
Impacted products
Vendor Product Version
grafana grafana Affected: >= 8.0.0, < 8.1.6
Affected: < 7.5.11
Create a notification for this product.
CISA KEV
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: 8abf3b96-398b-4f09-9cf0-39c21c03fe32

Vulnerability ID: CVE-2021-39226

Status: Confirmed

Status Updated: 2022-08-25 00:00 UTC

Exploited: Yes

Timestamps
First Seen: 2022-08-25
Asserted: 2022-08-25
Scope
Notes: KEV entry: Grafana Authentication Bypass Vulnerability | Affected: Grafana Labs / Grafana | Description: 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: Apply updates per vendor instructions. | Due date: 2022-09-15 | Known ransomware campaign use (KEV): Unknown | Notes (KEV): 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
Evidence

Type: Vendor Report

Signal: Successful Exploitation

Confidence: 80%

Source: cisa-kev

Details
Cwes CWE-287
Feed CISA Known Exploited Vulnerabilities Catalog
Product Grafana
Due Date 2022-09-15
Date Added 2022-08-25
Vendorproject Grafana Labs
Vulnerabilityname Grafana Authentication Bypass Vulnerability
Knownransomwarecampaignuse Unknown
References
Created: 2026-02-02 12:27 UTC | Updated: 2026-02-06 07:17 UTC
Show details on NVD website
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    "nvd": "{\"cve\":{\"id\":\"CVE-2021-39226\",\"sourceIdentifier\":\"security-advisories@github.com\",\"published\":\"2021-10-05T18:15:07.947\",\"lastModified\":\"2025-10-24T14:47:23.560\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"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.\"},{\"lang\":\"es\",\"value\":\"Grafana es una plataforma de visualizaci\u00f3n de datos de c\u00f3digo abierto. En las versiones afectadas los usuarios no autenticados y autenticados son capaces de visualizar la snapshot con la clave de base de datos m\u00e1s baja accediendo a las rutas literales /dashboard/snapshot/:key, o /api/snapshots/:key. Si el ajuste de configuraci\u00f3n \\\"public_mode\\\" de la snapshot se establece en true (frente a default o false), unos usuarios no autenticados pueden eliminar la snapshot con la clave de base de datos m\u00e1s baja al acceder a la ruta literal /api/snapshots-delete/:deleteKey. Independientemente de la configuraci\u00f3n de \\\"public_mode\\\" de la snapshot, unos usuarios autenticados pueden eliminar la snapshot con la clave de base de datos m\u00e1s baja accediendo a las rutas literales: /api/snapshots/:key, o /api/snapshots-delete/:deleteKey. La combinaci\u00f3n de borrado y visualizaci\u00f3n permite un recorrido completo mediante todos los datos de las snapshots mientras se produce una p\u00e9rdida total de datos de las mismas. 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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.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-287\", \"description\": \"CWE-287: Improper Authentication\"}]}], \"providerMetadata\": {\"orgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"shortName\": \"GitHub_M\", \"dateUpdated\": \"2021-10-30T01:08:52.000Z\"}, \"x_legacyV4Record\": {\"impact\": {\"cvss\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 9.8, \"attackVector\": \"NETWORK\", \"baseSeverity\": \"CRITICAL\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H\", \"integrityImpact\": \"HIGH\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"HIGH\", \"privilegesRequired\": \"NONE\", \"confidentialityImpact\": \"HIGH\"}}, \"source\": {\"advisory\": \"GHSA-69j6-29vr-p3j9\", \"discovery\": \"UNKNOWN\"}, \"affects\": {\"vendor\": {\"vendor_data\": [{\"product\": {\"product_data\": [{\"version\": {\"version_data\": [{\"version_value\": \"\u003e= 8.0.0, \u003c 8.1.6\"}, {\"version_value\": \"\u003c 7.5.11\"}]}, \"product_name\": \"grafana\"}]}, \"vendor_name\": \"grafana\"}]}}, \"data_type\": \"CVE\", \"references\": {\"reference_data\": [{\"url\": \"https://github.com/grafana/grafana/security/advisories/GHSA-69j6-29vr-p3j9\", \"name\": \"https://github.com/grafana/grafana/security/advisories/GHSA-69j6-29vr-p3j9\", \"refsource\": \"CONFIRM\"}, {\"url\": \"https://github.com/grafana/grafana/commit/2d456a6375855364d098ede379438bf7f0667269\", \"name\": \"https://github.com/grafana/grafana/commit/2d456a6375855364d098ede379438bf7f0667269\", \"refsource\": \"MISC\"}, {\"url\": \"https://grafana.com/docs/grafana/latest/release-notes/release-notes-7-5-11/\", \"name\": \"https://grafana.com/docs/grafana/latest/release-notes/release-notes-7-5-11/\", \"refsource\": \"MISC\"}, {\"url\": \"https://grafana.com/docs/grafana/latest/release-notes/release-notes-8-1-6/\", \"name\": \"https://grafana.com/docs/grafana/latest/release-notes/release-notes-8-1-6/\", \"refsource\": \"MISC\"}, {\"url\": \"http://www.openwall.com/lists/oss-security/2021/10/05/4\", \"name\": \"[oss-security] 20211005 CVE-2021-39226 Grafana snapshot authentication bypass\", \"refsource\": \"MLIST\"}, {\"url\": \"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/E6ANHRDBXQT6TURLP2THM26ZPDINFBEG/\", \"name\": \"FEDORA-2021-dd83dc8b0b\", \"refsource\": \"FEDORA\"}, {\"url\": \"https://security.netapp.com/advisory/ntap-20211029-0008/\", \"name\": \"https://security.netapp.com/advisory/ntap-20211029-0008/\", \"refsource\": \"CONFIRM\"}, {\"url\": \"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/DCKBFUSY6V4VU5AQUYWKISREZX5NLQJT/\", \"name\": \"FEDORA-2021-01588ab0bf\", \"refsource\": \"FEDORA\"}]}, \"data_format\": \"MITRE\", \"description\": {\"description_data\": [{\"lang\": \"eng\", \"value\": \"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.\"}]}, \"problemtype\": {\"problemtype_data\": [{\"description\": [{\"lang\": \"eng\", \"value\": \"CWE-287: Improper Authentication\"}]}]}, \"data_version\": \"4.0\", \"CVE_data_meta\": {\"ID\": \"CVE-2021-39226\", \"STATE\": \"PUBLIC\", \"TITLE\": \"Snapshot authentication bypass in grafana\", \"ASSIGNER\": \"security-advisories@github.com\"}}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2021-39226\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-10-21T23:25:30.669Z\", \"dateReserved\": \"2021-08-16T00:00:00.000Z\", \"assignerOrgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"datePublished\": \"2021-10-05T17:30:11.000Z\", \"assignerShortName\": \"GitHub_M\"}",
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}