CVE-2026-21724Network attack vector

Protected webhook redirection via omitted authorization check

Published Mar 26, 2026 · Updated Mar 26, 2026

Improper authorization in Grafana OSS allows remote authenticated users with Editor access to alter protected webhook URLs. The provisioning ContactPointService update path accepted incoming contact-point settings without comparing protected fields or invoking receiver authorization. An Editor can redirect protected webhook destinations without alert.notifications.receivers.protected:write, exposing alert data and changing delivery integrity.

CVSS severity5.4
Medium
EPSS probability0.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper authorization in Grafana OSS allows remote authenticated users with Editor access to alter protected webhook URLs. The provisioning ContactPointService update path accepted incoming contact-point settings without comparing protected fields or invoking receiver authorization. An Editor can redirect protected webhook destinations without alert.notifications.receivers.protected:write, exposing alert data and changing delivery integrity.

The record

CVE
CVE-2026-21724
Published
Mar 26, 2026
Updated
Mar 26, 2026
Vendor
Grafana Labs
Product
Grafana OSS
Classifications
CWE-285, T1567
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 26, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 26, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=11.6.9 <11.6.14
  2. Affected versionversion=12.1.5 <12.1.10
  3. Affected versionversion=12.2.2 <12.2.8
  4. Affected versionversion=12.3.1 <12.3.6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Grafana Labs · Grafana OSSversion=11.6.9 <11.6.14; version=12.1.5 <12.1.10; version=12.2.2 <12.2.8; version=12.3.1 <12.3.6

Published CVSS scores

4.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
5.4Grafana LabsCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-285Improper Authorization
T1567Exfiltration Over Web Service

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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