CVE-2026-33376

7.4 HIGH

When using an IPv6 allow-list for the Auth Proxy feature, it defaults to /32 addresses

Published: 2026-05-13 · Last updated: 2026-06-02

Severity and scoring

CVSS: 7.4 HIGH
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
CWE: CWE-1188

Affected products

Vendor	Product
grafana	grafana

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.

Source: NVD

References

[NVD]https://nvd.nist.gov/vuln/detail/CVE-2026-33376
[Vendor advisory]https://grafana.com/security/security-advisories/cve-2026-33376

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