Bug 2477262 (CVE-2026-33376) - CVE-2026-33376 grafana: Grafana Auth Proxy: Unauthorized access due to incorrect IPv6 allow-list default
Summary: CVE-2026-33376 grafana: Grafana Auth Proxy: Unauthorized access due to incorr...
Keywords:
Status: NEW
Alias: CVE-2026-33376
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On: 2501263
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-05-13 20:03 UTC by OSIDB Bzimport
Modified: 2026-08-24 15:06 UTC (History)
17 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:

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Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2026:54178 0 None None None 2026-08-12 06:57:35 UTC
Red Hat Product Errata RHSA-2026:58982 0 None None None 2026-08-24 15:06:56 UTC

Description OSIDB Bzimport 2026-05-13 20:03:14 UTC 
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.
Comment 4 errata-xmlrpc 2026-08-12 06:57:33 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:54178 https://access.redhat.com/errata/RHSA-2026:54178
Comment 5 errata-xmlrpc 2026-08-24 15:06:54 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:58982 https://access.redhat.com/errata/RHSA-2026:58982
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