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VulnerabilityPublished Updated

CVE-2026-21724: Grafana OSS · Improper Authorization

Affects Grafana OSSSource CVE Database V5

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Not known to be exploited · CVSS 5.4 Medium · fixed in 12.3.6 : update Grafana OSS when convenient.

Data as of 29 Oct 2026, 19:04 UTC

CVSS 3.1 base score
5.4Medium
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.2% chance of exploitation in 30 days – higher than 19% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 12.3.6, 12.2.8, 12.1.10 +1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 26 Mar 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 29 Oct 2026.

What to do

Upgrade Grafana OSS to 12.3.6, 12.2.8, 12.1.10 or 11.6.14.

Affected software

ProductAffectedFixed in
GrafanaGrafana OSSAffected
  • >=12.3.1 <12.3.6
Fixed in
  • 12.3.6
GrafanaGrafana OSSAffected
  • >=12.2.2 <12.2.8
Fixed in
  • 12.2.8
GrafanaGrafana OSSAffected
  • >=12.1.5 <12.1.10
Fixed in
  • 12.1.10
GrafanaGrafana OSSAffected
  • >=11.6.9 <11.6.14
Fixed in
  • 11.6.14

AI-suggested

If you cannot patch yet, restrict Editor role assignments to trusted users only and monitor changes to webhook configurations closely. Follow Grafana's official advisories for updates on patches or workarounds.

Description

A vulnerability has been discovered in Grafana OSS where an authorization bypass in the provisioning contact points API allows users with Editor role to modify protected webhook URLs without the required alert.notifications.receivers.protected:write permission.

References

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