CVE-2026-33376

High

Description

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.

SeverityHigh

CVSS7.4

Exploit probability—

Product

Grafana

PublishedMay 13, 2026

First seenMay 13, 2026

Weakness typeCWE-1188CWE-1188

How to fix

Update

grafana grafana11.6.14, 12.2.8, 12.3.6, 12.4.3 or later

Vendor advisories

grafana.com/security/security-advisories/cve-2026-33376

Affected products

Product	Affected versions	Fixed in
grafana grafana	8.5.0 ≤ v < 11.6.14, 12.2.0 ≤ v < 12.2.8, 12.3.0 ≤ v < 12.3.6, 12.4.0 ≤ v < 12.4.3, 11.6.14, 12.2.8, 12.3.6, 12.4.3, 13.0.0, 13.0.1	11.6.14, 12.2.8, 12.3.6, 12.4.3

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