Security readout for executives and security teams
Plain-English summary
Grafana v11.0.0 can allow a former datasource administrator to delete a newly recreated datasource without permission. The opportunity lasts only 30 seconds and requires the replacement to use the same UID on the same Grafana pod. The impact is limited to datasource availability; the supplied sources report no confidentiality or integrity impact.
Executive priority
Treat as a low-priority but valid maintenance issue. Prioritize environments running v11.0.0 where datasource administration is broadly delegated or datasource loss could disrupt important monitoring. Escalate if logs show rapid same-UID recreation and deletion. Follow Grafana’s advisory because the supplied sources do not name a fixed release.
Technical view
This CWE-367 TOCTOU authorization bypass affects datasource deletion by name. Exploitation requires prior administrative access, deletion and same-UID recreation within 30 seconds, execution on the same pod, and removal of the attacker’s new administrative rights. A successful attempt permits only re-deletion of that replacement datasource.
Likely exposure
Exposure is narrow. The supplied affected-product data identifies Grafana v11.0.0. Practical risk requires a user with prior datasource administration rights, coordinated recreation using an identical UID, and same-pod requests within 30 seconds. Randomized UIDs normally make this sequence less likely.
Exploitation context
The supplied bundle does not identify active exploitation, and the CVE is not listed as KEV there. Exploitation has high complexity, requires prior privileges and another person recreating the datasource, and causes limited availability loss. No exploit procedure or public weaponization evidence is provided.
Researcher notes
The constraints substantially limit reproducibility: prior datasource administration, a second actor, identical UID, same pod, and a 30-second window are all required. The authorization failure applies only to the recreated datasource with that UID. Available evidence supports availability impact only, with CVSS 3.1 score 2.6 and vector AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:N/A:L.
Mitigation direction
- Review Grafana’s advisory and apply its supported remediation; the supplied sources name no fixed version.
- Restrict datasource administration to trusted users and revoke unnecessary privileges.
- Avoid recreating deleted datasources with the same UID during the 30-second window.
- Monitor rapid delete-recreate-delete sequences and investigate unexpected datasource loss.
Validation and detection
- Identify whether any deployed Grafana instance runs v11.0.0.
- Review datasource permissions for users who previously held administrative access.
- Inspect logs for same-UID deletion, recreation, and re-deletion within 30 seconds on one pod.
- Confirm recreated datasources receive new randomized UIDs.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-367: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupPrivilege behavior lookup
The CVE wording references privilege impact, so privilege escalation and authorization behavior review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2026-21725 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Low
- CVSS
- 2.6 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:N/A:L
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
SSVC decision data
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:N/A:L1.21.4GRAFANAVulnerability scoring details
Base CVSS 3.1 score
2.6LowVector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:N/A:L
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- https://grafana.com/security/security-advisories/cve-2026-21725CVE reference, GRAFANA · vendor-advisory
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Time-of-check Time-of-use (TOCTOU) Race Condition
Time-of-check Time-of-use (TOCTOU) Race Condition represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.