CVE-2026-33376

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.

CVSS v3 7.4 HIGH

7.4^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.2 / Impact : 5.2

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://grafana.com/security/security-advisories/cve-2026-33376	Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:grafana:grafana::::::::
	cpe:2.3:a:grafana:grafana::::::::
	cpe:2.3:a:grafana:grafana::::::::
	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:-::::::

History

26 Oct 2026, 14:10

Type	Values Removed	Values Added
Summary		(es) Al usar una lista de permitidos IPv6 para la función de Proxy de Autenticación, se establece por defecto en direcciones /32. Las direcciones que especifican una máscara explícitamente no se ven afectadas; para mitigar fácilmente, añada la máscara deseada (normalmente /128) a las direcciones. Solo el proxy de autenticación se ve afectado; Okta, SAML, LDAP, etc. no se ven afectados aquí.

Information

Published : 2026-05-13 20:16

Updated : 2026-10-26 14:10

NVD link : CVE-2026-33376

Mitre link : CVE-2026-33376

CVE.ORG link : CVE-2026-33376

JSON object : View

Products Affected

grafana

grafana

CWE

CWE-1188

Initialization of a Resource with an Insecure Default

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