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.