Auth Proxy IPv6 whitelist bypass

High
Advisory ID:CVE-2026-33376
Published:2026-05-13
Product:Grafana
CVSS Score:7.4
CVSS Vector:CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Fixed Versions:
>=11.6.14+security-04
>=12.2.8+security-04
>=12.3.6+security-04
>=12.4.3+security-02
>=13.0.1+security-01

Summary

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.

This vulnerability was reported via our bug bounty program.