Grafana up to 13.0.1 OAuth Login allocation of resources

Summaryinfo

A vulnerability, which was classified as problematic, was found in Grafana up to 11.6.14/12.2.8/12.3.6/12.4.3/13.0.1. The affected element is an unknown function of the component OAuth Login Handler. The manipulation results in allocation of resources. This vulnerability is identified as CVE-2026-8609. The attack can be executed remotely. There is not any exploit available.

Detailsinfo

A vulnerability, which was classified as problematic, was found in Grafana up to 11.6.14/12.2.8/12.3.6/12.4.3/13.0.1. Affected is some unknown functionality of the component OAuth Login Handler. The manipulation with an unknown input leads to a allocation of resources vulnerability. CWE is classifying the issue as CWE-770. The product allocates a reusable resource or group of resources on behalf of an actor without imposing any restrictions on the size or number of resources that can be allocated, in violation of the intended security policy for that actor. This is going to have an impact on availability. CVE summarizes:

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).

The advisory is available at grafana.com. This vulnerability is traded as CVE-2026-8609 since 05/14/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1499 by the MITRE ATT&CK project.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Name

• Grafana

Version

• 11.6.0
• 11.6.1
• 11.6.2
• 11.6.3
• 11.6.4
• 11.6.5
• 11.6.6
• 11.6.7
• 11.6.8
• 11.6.9
• 11.6.10
• 11.6.11
• 11.6.12
• 11.6.13
• 11.6.14
• 12.2.0
• 12.2.1
• 12.2.2
• 12.2.3
• 12.2.4
• 12.2.5
• 12.2.6
• 12.2.7
• 12.2.8
• 12.3.0
• 12.3.1
• 12.3.2
• 12.3.3
• 12.3.4
• 12.3.5
• 12.3.6
• 12.4.0
• 12.4.1
• 12.4.2
• 12.4.3
• 13.0.0
• 13.0.1

License

• open-source

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