CVE-2026-8609 - Vulnerability Details - OpenCVE

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).

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact Low

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Exploitation none

Automatable yes

Technical Impact partial

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

Grafana

Grafana OSS

unaffected

Version	Status	Constraints
`11.6.0`	affected	≤ 11.6.14
`12.2.0`	affected	≤ 12.2.8
`12.3.0`	affected	≤ 12.3.6
`12.4.0`	affected	≤ 12.4.3
`13.0.0`	affected	≤ 13.0.1

No data.

No data.

No data.

Project Subscriptions

No data.

Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References

Link	Providers
https://grafana.com/security/security-advisories/cve-2026-8609

History

Fri, 10 Jul 2026 16:30:00 +0000

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Fri, 10 Jul 2026 15:45:00 +0000

Type	Values Removed	Values Added
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).
Title		Pre-authentication denial of service via the OAuth login route
Weaknesses		CWE-400
References		https://grafana.com/security/security-advisories/cve-2026-8609
Metrics		cvssV3_1 `{'score': 5.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L'}`

Projects

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MITRE

Status: PUBLISHED

Assigner: GRAFANA

Published: 2026-07-10T14:58:33.522Z

Updated: 2026-07-10T15:53:51.365Z

Reserved: 2026-05-14T16:01:42.297Z

Link: CVE-2026-8609

Vulnrichment

Updated: 2026-07-10T15:53:27.882Z

NVD

No data.

Redhat

No data.

OpenCVE Enrichment

No data.

Weaknesses

CWE-400

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