CVE-2026-8609 — Pre-authentication denial of service via the OAuth login route

CVE-2026-8609

Pre-authentication denial of service via the OAuth login route PUBLISHED

Description (CNA)

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).

Affected (CNA)

Vendor / product	Versions
Grafana / Grafana OSS	affected 11.6.0 through 11.6.14; affected 12.2.0 through 12.2.8; affected 12.3.0 through 12.3.6; affected 12.4.0 through 12.4.3; affected 13.0.0 through 13.0.1

CWE

CWE-400

References

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

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.