# CVE-2026-8609: grafana: An unauthenticated attacker can repeatedly call Grafana's OAuth login route with unique values, causing unbounded mem...

CVE-2026-8609 is fixed in 3 products on 1 platform, first by RHSA-2026:67517, released July 6, 2026. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2026-8609
- Priority: High
- CVSS: 7.4 (moderate)
- EPSS: 0.0040
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jul 10, 2026

## Description

An unauthenticated attacker can repeatedly call Grafana's OAuth login route with unique values, causing unbounded memory growth that can eventually exhaust memory and crash the Grafana instance (denial of service).

## 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_8.4 | [RHSA-2026:90811](https://patchblox.com/security/data/fix/linux/rhsa-2026-90811.md) | Oct 30, 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 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_8.7 | [ELSA-2026-90811](https://patchblox.com/security/data/fix/linux/elsa-2026-90811.md) | Nov 7, 2026 |
| Linux | grafana opensuse-leap 16.0 | 12.4.10-bp160.1.1 | [OPENSUSE-SU-2026:22125-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-22125-1.md) | Nov 7, 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 sles 15.7 | 12.4.10-150200.3.94.3 | [SUSE-SU-2026:4600-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-4600-1.md) | Nov 7, 2026 |
| Linux | grafana-selinux RHEL 9 | 0:10.2.6-23.el9_8.4 | [RHSA-2026:90811](https://patchblox.com/security/data/fix/linux/rhsa-2026-90811.md) | Oct 30, 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 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_8.7 | [ELSA-2026-90811](https://patchblox.com/security/data/fix/linux/elsa-2026-90811.md) | Nov 7, 2026 |
| Linux | system-user-grafana sles 15.7 | 1.0.0-150200.5.8.1 | [SUSE-SU-2026:4600-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-4600-1.md) | Nov 7, 2026 |

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Data as of 2026-11-08T13:06:02Z 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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