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NVD / CVE Program· CNA GRAFANA

CVE-2026-21725: Authorization Bypass via TOCTOU in Grafana Datasource Deletion by Name

Noroxi assessment

Priority: Monitor (action score 8/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.18% (FIRST EPSS).
  • Anyone who can reach it over the internet can trigger it. Administrator privileges are required. A user must open a link or visit a page. Special conditions such as timing or configuration are required.
  • Fixed version: Grafana Grafana v12.4.1.

Low priority for now. Upgrade to Grafana Grafana v12.4.1 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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.

LowCVSS 2.0 · v3.1—No exploit Fix available
Published
Feb 25, 2026
Updated
Aug 27, 2026
EPSS
0.1% · 8th percentile

Report tools

JSON

Action score

8

Monitor

Low priority for now.

CVSS
8 / 40 · 2.0 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
2.0
CNA · GRAFANA
2.6
0.6 point gap

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

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2026-21725

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
grafanagrafana

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • grafana grafana11.0.0 and later · before 12.4.1

Versions reported by the vendor

Affected version ranges reported by the assigning authority (GRAFANA). Independent of NVD's CPE analysis and usually ahead of it.

  • Grafana Grafana

    • v11.0.0 and later · before v12.4.1affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
openSUSE:Leap 16.0grafanabefore 11.6.14+security04-bp160.1.111.6.14+security04-bp160.1.1
openSUSE:Leap 16.0grafanabefore 12.4.5-bp160.1.112.4.5-bp160.1.1
openSUSE:Tumbleweedgrafanabefore 11.6.14+security01-1.111.6.14+security01-1.1
SUSE:Linux Enterprise Module for Package Hub 15 SP7grafanabefore 12.4.5-150200.3.91.112.4.5-150200.3.91.1
SUSE:Multi Linux Manager Tools SLE-15golang-github-lusitaniae-apache_exporterbefore 1.0.10-150002.3.6.11.0.10-150002.3.6.1
SUSE:Multi Linux Manager Tools SLE-15golang-github-prometheus-prometheusbefore 3.5.0-150002.3.8.13.5.0-150002.3.8.1
SUSE:Multi Linux Manager Tools SLE-15grafanabefore 11.6.14+security01-150002.4.14.111.6.14+security01-150002.4.14.1
SUSE:Multi Linux Manager Tools SLE-15prometheus-blackbox_exporterbefore 0.26.0-150002.3.6.10.26.0-150002.3.6.1
SUSE:Multi Linux Manager Tools SLE-15spacecmdbefore 5.1.13-150002.3.9.35.1.13-150002.3.9.3
SUSE:Multi Linux Manager Tools SLE-15uyuni-toolsbefore 5.1.26-150002.3.12.15.1.26-150002.3.12.1

Same product

grafana: all records

Other highest-scoring records for the same primary product.

Published before and after this one in the same product

  • ← EarlierCVE-2025-41117Feb 12, 2026 · XSS in Grafana Explore stack trace
    24Monitor
  • ← EarlierCVE-2026-21722Feb 12, 2026 · Public Dashboards time range restriction on annotations can be bypassed
    21Monitor
  • Later →CVE-2026-21724Mar 26, 2026 · Missing Protected-field Authorization in Provisioning Contact Points API
    17Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Grafana Grafanav12.4.1Vendor (CNA)
opensuse:grafana11.6.14+security01-1.1 · openSUSE:TumbleweedPackage registry (OSV)
suse:golang-github-lusitaniae-apache_exporter1.0.10-150002.3.6.1 · SUSE:Multi Linux Manager Tools SLE-15Package registry (OSV)
suse:golang-github-prometheus-prometheus3.5.0-150002.3.8.1 · SUSE:Multi Linux Manager Tools SLE-15Package registry (OSV)
suse:grafana11.6.14+security01-150002.4.14.1 · SUSE:Multi Linux Manager Tools SLE-15Package registry (OSV)
suse:prometheus-blackbox_exporter0.26.0-150002.3.6.1 · SUSE:Multi Linux Manager Tools SLE-15Package registry (OSV)
suse:spacecmd5.1.13-150002.3.9.3 · SUSE:Multi Linux Manager Tools SLE-15Package registry (OSV)
suse:uyuni-tools5.1.26-150002.3.12.1 · SUSE:Multi Linux Manager Tools SLE-15Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

The product’s vendor appears in a public program. Matched by name; verify the scope text in the program.

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • Administrator privileges are required.
  • A user must open a link or visit a page.
  • Special conditions such as timing or configuration are required.

If successful

Confidentiality
none
Integrity
low · data or configuration can be modified
Availability
none
Attack vector
Network
Attack complexity
High
Privileges required
High
User interaction
Required
Scope
Unchanged
Confidentiality impact
None
Integrity impact
Low
Availability impact
None

Weakness class (CWE)

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

CVSS vector

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

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

—

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records