# CVE-2026-33376: grafana: When using an IPv6 allow-list for the Auth Proxy feature, it defaults to /32 addresses

CVE-2026-33376 is fixed in 2 products on 1 platform, first by OPENSUSE-SU-2026:20940-1, released June 10, 2026. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2026-33376
- Priority: High
- CVSS: 7.4 (moderate)
- EPSS: 0.0028
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: May 13, 2026

## 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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | grafana RHEL 10 | 10.2.6-26.el10_0 | [RHSA-2026:67517](https://patchblox.com/security/data/fix/linux/rhsa-2026-67517.md) | Jul 6, 2026 |
| Linux | grafana RHEL 9 | 0:10.2.6-23.el9_8.2 | [RHSA-2026:58982](https://patchblox.com/security/data/fix/linux/rhsa-2026-58982.md) | Aug 28, 2026 |
| Linux | grafana almalinux 10 | 10.2.6-28.el10_2.4 | [ALSA-2026:54178](https://patchblox.com/security/data/fix/linux/alsa-2026-54178.md) | Aug 12, 2026 |
| Linux | grafana almalinux 9 | 10.2.6-23.el9_8.2 | [ALSA-2026:58982](https://patchblox.com/security/data/fix/linux/alsa-2026-58982.md) | Aug 24, 2026 |
| Linux | grafana ol 10 | 0:10.2.6-28.el10_2.4 | [ELSA-2026-54178](https://patchblox.com/security/data/fix/linux/elsa-2026-54178.md) | Aug 12, 2026 |
| Linux | grafana ol 9 | 0:10.2.6-23.el9_8.2 | [ELSA-2026-58982](https://patchblox.com/security/data/fix/linux/elsa-2026-58982.md) | Aug 24, 2026 |
| Linux | grafana opensuse-leap 16.0 | 11.6.14+security04-bp160.1.1 | [OPENSUSE-SU-2026:20940-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-20940-1.md) | Jun 10, 2026 |
| Linux | grafana rocky 10 | 0:10.2.6-28.el10_2.4 | [RLSA-2026:54178](https://patchblox.com/security/data/fix/linux/rlsa-2026-54178.md) | Aug 13, 2026 |
| Linux | grafana rocky 9 | 0:10.2.6-23.el9_8.2 | [RLSA-2026:58982](https://patchblox.com/security/data/fix/linux/rlsa-2026-58982.md) | Aug 25, 2026 |
| Linux | grafana sles 15.7 | 12.4.5-150200.3.91.1 | [SUSE-SU-2026:3718-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-3718-1.md) | Aug 24, 2026 |
| Linux | grafana-selinux RHEL 9 | 0:10.2.6-23.el9_8.2 | [RHSA-2026:58982](https://patchblox.com/security/data/fix/linux/rhsa-2026-58982.md) | Aug 28, 2026 |
| Linux | grafana-selinux almalinux 10 | 10.2.6-28.el10_2.4 | [ALSA-2026:54178](https://patchblox.com/security/data/fix/linux/alsa-2026-54178.md) | Aug 12, 2026 |
| Linux | grafana-selinux almalinux 9 | 10.2.6-23.el9_8.2 | [ALSA-2026:58982](https://patchblox.com/security/data/fix/linux/alsa-2026-58982.md) | Aug 24, 2026 |
| Linux | grafana-selinux ol 10 | 0:10.2.6-28.el10_2.4 | [ELSA-2026-54178](https://patchblox.com/security/data/fix/linux/elsa-2026-54178.md) | Aug 12, 2026 |
| Linux | grafana-selinux ol 9 | 0:10.2.6-23.el9_8.2 | [ELSA-2026-58982](https://patchblox.com/security/data/fix/linux/elsa-2026-58982.md) | Aug 24, 2026 |

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Data as of 2026-11-08T06:59:42Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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