CVE-2026-8609

MEDIUM

Pre-authentication denial of service via the OAuth login route

Title source: cna

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).

References (1)

Core 1

Core References

Vendor Advisory vendor-advisory

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

Scores

CVSS v3 5.3

EPSS 0.0040

EPSS Percentile 32.5%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

CISA SSVC

Vulnrichment

Exploitation none

Automatable yes

Technical Impact partial

Details

CWE

CWE-400

Status published

Products (6)

grafana/grafana 11.6.0 - 11.6.15

Grafana/Grafana OSS 11.6.0 - 11.6.14

Grafana/Grafana OSS 12.2.0 - 12.2.8

Grafana/Grafana OSS 12.3.0 - 12.3.6

Grafana/Grafana OSS 12.4.0 - 12.4.3

Grafana/Grafana OSS 13.0.0 - 13.0.1

Published Jul 10, 2026

Tracked Since Jul 10, 2026