CVE-2026-8609Network attack vector

Pre-authentication crash via unbounded OAuth memory consumption

Published Jul 10, 2026 · Updated Jul 10, 2026

Uncontrolled resource consumption in Grafana OSS allows remote attackers to crash the server through unauthenticated OAuth login requests. The OAuth login route handles attacker-supplied unique values without bounding process-memory growth; Grafana Labs has not disclosed the retained object or faulty lifetime operation. Releases 11.6.0 through 11.6.14, 12.2.0 through 12.2.8, 12.3.0 through 12.3.6, 12.4.0 through 12.4.3, and 13.0.0 through 13.0.1 are affected, and repeated requests can exhaust memory and terminate the instance.

CVSS severity5.3
Medium
EPSS probability0.40%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Uncontrolled resource consumption in Grafana OSS allows remote attackers to crash the server through unauthenticated OAuth login requests. The OAuth login route handles attacker-supplied unique values without bounding process-memory growth; Grafana Labs has not disclosed the retained object or faulty lifetime operation. Releases 11.6.0 through 11.6.14, 12.2.0 through 12.2.8, 12.3.0 through 12.3.6, 12.4.0 through 12.4.3, and 13.0.0 through 13.0.1 are affected, and repeated requests can exhaust memory and terminate the instance.

The record

CVE
CVE-2026-8609
Published
Jul 10, 2026
Updated
Jul 10, 2026
Vendor
Grafana Labs
Product
Grafana OSS
Classifications
CWE-400, T1499.003
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 10, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 10, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=11.6.0 <=11.6.14
  2. Affected versionversion=12.2.0 <=12.2.8
  3. Affected versionversion=12.3.0 <=12.3.6
  4. Affected versionversion=12.4.0 <=12.4.3
  5. Affected versionversion=13.0.0 <=13.0.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Grafana Labs · Grafana OSSversion=11.6.0 <=11.6.14; version=12.2.0 <=12.2.8; version=12.3.0 <=12.3.6; version=12.4.0 <=12.4.3; version=13.0.0 <=13.0.1

Published CVSS scores

5.3Grafana LabsCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-400Uncontrolled Resource Consumption
T1499.003Application Exhaustion Flood

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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