CVE-2026-21725

Advisory lineage Upstream: 0 Downstream: 3
Modified
Published: 25 Feb 2026, 12:35
Last modified:13 May 2026, 19:28

Vulnerability Summary

Overall Risk (default)
low
10/100
CVSS Score
2.6 LOW
v3.1 (cve.org)
EPSS Score
0.01% LOW
0% probability 0.00%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

25 Feb 2026, 12:35
Published
Vulnerability first disclosed
13 May 2026, 19:28
Last Modified
Vulnerability information updated

Description

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.

CVSS Metrics

  • v3.1•LOW•Score: 2.6CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:N/A:L
  • v3.1•LOW•Score: 2CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:N/I:L/A:N

EPSS Trends

Current EPSS score: 0.01%• Percentile: 3%

Techniques & Countermeasures

  • CWE-367•Time-of-check Time-of-use (TOCTOU) Race Condition

    The product checks the state of a resource before using that resource, but the resource's state can change between the check and the use in a way that invalidates the results of the check.

Affected Systems

  • grafana•grafana

    ≥ 11.0.0, < 12.4.1 | ≥ v11.0.0, < v12.4.1

References (1)