CVE-2026-33376 — Auth Proxy IPv6 whitelist bypass

Description (CNA)

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 (CNA)

Vendor / product	Versions
Grafana / Grafana OSS	affected 9.4.0 through 11.6.14; affected 11.6.14 before 11.6.14+security-04; affected 12.0.0 through 12.2.8; affected 12.2.8 before 12.2.8+security-04; affected 12.3.0 through 12.3.6; affected 12.3.6 before 12.3.6+security-04; affected 12.4.0 through 12.4.3; affected 12.4.3 before 12.4.3+security-02; affected 13.0.0 through 13.0.1; affected 13.0.1 before 13.0.1+security-01

CWE

No CWE identifiers supplied.

References

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

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.