UBUNTU-CVE-2026-21725

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: 2CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:N/I:L/A:N

Affected Systems

• ubuntu•grafana

  all

References (3)

• https://ubuntu.com/security/CVE-2026-21725
• https://www.cve.org/CVERecord?id=CVE-2026-21725
• https://grafana.com/security/security-advisories/cve-2026-21725