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CVE-2026-8609

Pre-authentication denial of service via the OAuth login route

Published: Jul 10, 2026Updated: Jul 13, 2026 Sources: CVE List NVDCWE-400
5.3MEDIUM
NVD MITRE
EPSS Score
0.4%
Top 67.6%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
OpenVAS

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).

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:NI:NA:L
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:LAvailability
Low
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Weaknesses

CWE-400

Affected Products

Grafana
oss-project·US
Grafana OSSOn-premWeb App
Enterprise Software / itsm-monitoring
grafanaOn-premWeb App
Enterprise Software / itsm-monitoring

Exploitability

Official Patch Available
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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

1 technique
Impact
View detailed technique mapping

References

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

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