CVE-2026-33376 PUBLISHED

Auth Proxy IPv6 whitelist bypass

Assigner: GRAFANA
Reserved: 19.03.2026 Published: 13.05.2026 Updated: 13.05.2026

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.

Metrics

CVSS Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
CVSS Score: 7.4

Product Status

Vendor Grafana
Product Grafana OSS
Versions Default: unaffected
  • affected from 9.4.0 to 11.6.14 (incl.)
  • affected from 11.6.14 to 11.6.14+security-04 (excl.)
  • affected from 12.0.0 to 12.2.8 (incl.)
  • affected from 12.2.8 to 12.2.8+security-04 (excl.)
  • affected from 12.3.0 to 12.3.6 (incl.)
  • affected from 12.3.6 to 12.3.6+security-04 (excl.)
  • affected from 12.4.0 to 12.4.3 (incl.)
  • affected from 12.4.3 to 12.4.3+security-02 (excl.)
  • affected from 13.0.0 to 13.0.1 (incl.)
  • affected from 13.0.1 to 13.0.1+security-01 (excl.)

References