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Vulnerabilities/CVE-2026-33376Public Intelligence Dossier
Source: grafana · Limited verification•Last verified: •Collection Healthy
CVE-2026-33376Unknown / EvaluatingHIGH (raw)CVSS 7.4CWE-1188

When using an IPv6 allow-list for the Auth Proxy feature, it defaults to /32 addresses

Published: 14 May 2026•Last updated: 26 Oct 2026, 07:40 PM IST•Source identifier: security@grafana.com
Dossier completeness: source-provided sections 2 / 3 · rule guidance available. Missing source facts count as incomplete.
Official source
CISA KEV catalog
Unknown
KEV status was not determined.
CVSS score
7.4HIGH (raw)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Metric sourcesecurity@grafana.com
EPSS probability
0.3%0.003
Percentile21st
Weakness type
CWE-1188
No further CWE recorded
Remediation
Patch status unknown
No fixed version or KB recorded

Why It Matters

Analysis dossier

Why It Matters

When using an IPv6 allow-list for the Auth Proxy feature, it defaults to /32 addresses. Addresses specifying a mask explicitly are not affected; to mitigate easily, add the desired mask (usually /128) to the addresses. Only auth proxy is affected; Okta, SAML, LDAP, etc are unaffected here.

SOC priority

High

Actively exploited (source statement)

Unknown

Publicly disclosed

Unknown

Risk basis: SOC ecosystem technology relevance; HIGH severity; Source severity; no confirmed exploitation signal

Affected Products & Remediation

1 source-backed product
Affected products and versions (source)
  • grafana grafana · >= 8.5.0 < 11.6.14; >= 12.2.0 < 12.2.8; >= 12.3.0 < 12.3.6; >= 12.4.0 < 12.4.3; 11.6.14; 12.2.8; 12.3.6; 12.4.3; 13.0.0; 13.0.1 · NVD CPE · Source
Recorded patch / KBNot provided by source

Vendor or catalog guidance (source)

Not provided by source

Known exploitation (source facts)

Only what a source states. Unknown means no source has said either way; it is not "not exploited".

CISA KEV
Unknown
Exploited (source statement)
Unknown
Publicly disclosed (source)
Unknown

Suggested hunting (rule-based inference)

SecOps Signal recommendation (rule-based inference). These steps are hunting hypotheses from the vulnerability class; they do not state or imply that exploitation occurred here or anywhere.

Matched network-unauthenticated (CVSS AV:N, CVSS PR:N, CVSS UI:N)

Exposure

  1. Identify devices reporting this CVE and note which expose the affected service to untrusted networks.Telemetry: DeviceTvmSoftwareVulnerabilities · A network-reachable, no-privilege vector makes internet-facing instances the first exposure question. · Rule network-unauthenticated

Exploitation evidence

  1. Review inbound connections to the affected service from unexpected sources since the advisory date.Telemetry: DeviceNetworkEvents · Hunting hypothesis from the CVSS vector; it does not show that exploitation occurred. · Rule network-unauthenticated

Response

  1. Confirm the source-stated update is installed and the CVE is no longer reported.Telemetry: DeviceTvmSoftwareVulnerabilities · A follow-up inventory check verifies remediation. · Rule network-unauthenticated

CISA KEV Record

CISA KEV status was not determined for this record.

Change History & Source Data

— No recorded material change

CNA / source
security@grafana.com
Record status · verification
UPDATED · NVD API
CPE
cpe:2.3:a:grafana:grafana:*:*:*:*:*:*:*:*, cpe:2.3:a:grafana:grafana:11.6.14:-:*:*:*:*:*:*, cpe:2.3:a:grafana:grafana:11.6.14:security01:*:*:*:*:*:*, cpe:2.3:a:grafana:grafana:12.2.8:-:*:*:*:*:*:*, cpe:2.3:a:grafana:grafana:12.2.8:security01:*:*:*:*:*:*, cpe:2.3:a:grafana:grafana:12.3.6:-:*:*:*:*:*:*, cpe:2.3:a:grafana:grafana:12.3.6:security01:*:*:*:*:*:*, cpe:2.3:a:grafana:grafana:12.4.3:-:*:*:*:*:*:*, cpe:2.3:a:grafana:grafana:13.0.0:*:*:*:*:*:*:*, cpe:2.3:a:grafana:grafana:13.0.1:-:*:*:*:*:*:*

Evidence & Provenance

2 public sources
grafana.comSource recordnvd.nist.govSource record

Linked by the query's stored exact CVE association. Review required tables and validation status before use.

Detection Hunting Query
Target: DeviceTvmSoftwareVulnerabilities•Defender XDR
Detect endpoints exposed to CVE-2026-33376
Purpose: Exposure assessment (Category: Exposure Check)Why linked: Query metadata names CVE-2026-33376
DeviceTvmSoftwareVulnerabilities| where CveId == "CVE-2026-33376"| project DeviceId, DeviceName, OSPlatform, OSVersion, SoftwareVendor, SoftwareName, SoftwareVersion, CveId, VulnerabilitySeverityLevel, RecommendedSecurityUpdate, RecommendedSecurityUpdateId| sort by VulnerabilitySeverityLevel desc
Schema Checked · Not runtime validatedSource: SecOps Signal deterministic template · Limited verificationStatic screening: Passed structure and schema checks; tenant execution is not verified.
Open KQL Library

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Correlated briefings

SecOps Signal surfaces public advisory facts only. A missing value means the source has not published it, not that your environment is unaffected. No tenant inventory is connected.