CVE-2026-21725 (GCVE-0-2026-21725)
Vulnerability from cvelistv5 – Published: 2026-02-25 12:35 – Updated: 2026-02-25 15:13
VLAI?
Title
Authorization Bypass via TOCTOU in Grafana Datasource Deletion by Name
Summary
A time-of-create-to-time-of-use (TOCTOU) vulnerability lets recently deleted-then-recreated data sources be re-deleted without permission to do so.
This requires several very stringent conditions to be met:
- The attacker must have admin access to the specific datasource prior to its first deletion.
- Upon deletion, all steps within the attack must happen within the next 30 seconds and on the same pod of Grafana.
- The attacker must delete the datasource, then someone must recreate it.
- The new datasource must not have the attacker as an admin.
- The new datasource must have the same UID as the prior datasource. These are randomised by default.
- The datasource can now be re-deleted by the attacker.
- Once 30 seconds are up, the attack is spent and cannot be repeated.
- No datasource with any other UID can be attacked.
Severity ?
Assigner
References
| URL | Tags | ||||
|---|---|---|---|---|---|
|
|||||
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-21725",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-02-25T15:13:32.666615Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-02-25T15:13:57.618Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"platforms": [
"OnPrem"
],
"product": "Grafana",
"vendor": "Grafana",
"versions": [
{
"lessThan": "v12.4.1",
"status": "affected",
"version": "v11.0.0",
"versionType": "semver"
}
]
}
],
"datePublic": "2026-02-25T08:21:23.844Z",
"descriptions": [
{
"lang": "en",
"value": "A time-of-create-to-time-of-use (TOCTOU) vulnerability lets recently deleted-then-recreated data sources be re-deleted without permission to do so.\n\nThis requires several very stringent conditions to be met:\n\n- The attacker must have admin access to the specific datasource prior to its first deletion.\n- Upon deletion, all steps within the attack must happen within the next 30 seconds and on the same pod of Grafana.\n- The attacker must delete the datasource, then someone must recreate it.\n- The new datasource must not have the attacker as an admin.\n- The new datasource must have the same UID as the prior datasource. These are randomised by default.\n- The datasource can now be re-deleted by the attacker.\n- Once 30 seconds are up, the attack is spent and cannot be repeated.\n- No datasource with any other UID can be attacked."
}
],
"metrics": [
{
"cvssV3_1": {
"baseScore": 2.6,
"baseSeverity": "LOW",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:N/A:L",
"version": "3.1"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-02-25T12:35:43.104Z",
"orgId": "57da9224-a3e2-4646-9d0e-c4dc2e05e7da",
"shortName": "GRAFANA"
},
"references": [
{
"tags": [
"vendor-advisory"
],
"url": "https://grafana.com/security/security-advisories/cve-2026-21725"
}
],
"source": {
"discovery": "BUG_BOUNTY"
},
"title": "Authorization Bypass via TOCTOU in Grafana Datasource Deletion by Name",
"x_generator": {
"engine": "cvelib 1.8.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "57da9224-a3e2-4646-9d0e-c4dc2e05e7da",
"assignerShortName": "GRAFANA",
"cveId": "CVE-2026-21725",
"datePublished": "2026-02-25T12:35:43.104Z",
"dateReserved": "2026-01-05T09:26:06.214Z",
"dateUpdated": "2026-02-25T15:13:57.618Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"nvd": "{\"cve\":{\"id\":\"CVE-2026-21725\",\"sourceIdentifier\":\"security@grafana.com\",\"published\":\"2026-02-25T13:16:05.240\",\"lastModified\":\"2026-02-25T14:15:29.980\",\"vulnStatus\":\"Undergoing Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"A time-of-create-to-time-of-use (TOCTOU) vulnerability lets recently deleted-then-recreated data sources be re-deleted without permission to do so.\\n\\nThis requires several very stringent conditions to be met:\\n\\n- The attacker must have admin access to the specific datasource prior to its first deletion.\\n- Upon deletion, all steps within the attack must happen within the next 30 seconds and on the same pod of Grafana.\\n- The attacker must delete the datasource, then someone must recreate it.\\n- The new datasource must not have the attacker as an admin.\\n- The new datasource must have the same UID as the prior datasource. These are randomised by default.\\n- The datasource can now be re-deleted by the attacker.\\n- Once 30 seconds are up, the attack is spent and cannot be repeated.\\n- No datasource with any other UID can be attacked.\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"security@grafana.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:N/A:L\",\"baseScore\":2.6,\"baseSeverity\":\"LOW\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"HIGH\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"REQUIRED\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"LOW\"},\"exploitabilityScore\":1.2,\"impactScore\":1.4}]},\"references\":[{\"url\":\"https://grafana.com/security/security-advisories/cve-2026-21725\",\"source\":\"security@grafana.com\"}]}}"
}
}
Loading…
Loading…
Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Loading…
Loading…