7.4
High
CVE-2026-33376 When using an IPv6 allow-list for the Auth Proxy feature, it defaults to /32 addresses
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.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Grafana OSS 13.0 | earliest → 13.0.1 | 13.0.1+security-01 |
| Grafana OSS 12.4 | earliest → 12.4.3 | 12.4.3+security-02 |
| Grafana OSS 12.3 | earliest → 12.3.6 | 12.3.6+security-04 |
| Grafana OSS 12.2 | earliest → < 12.2.8+security-04 | 12.2.8+security-04 |
| Grafana OSS 12.0 | 12.0.0 → 12.2.8 | No fix stated |
| Grafana OSS 11.6 | earliest → < 11.6.14+security-04 | 11.6.14+security-04 |
| Grafana OSS 9.4 | 9.4.0 → 11.6.14 | No fix stated |
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