CVE-2026-8609

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).

CVSS v3 5.3 MEDIUM

5.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 3.9 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact LOW

Scope UNCHANGED

References

Link	Resource
https://grafana.com/security/security-advisories/cve-2026-8609	Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:grafana:grafana:::::-:::*
	cpe:2.3:a:grafana:grafana:::::-:::*
	cpe:2.3:a:grafana:grafana:::::-:::*
	cpe:2.3:a:grafana:grafana:::::-:::*
	cpe:2.3:a:grafana:grafana:::::-:::*

History

25 Oct 2026, 15:10

Type	Values Removed	Values Added
Summary		(es) Un atacante no autenticado puede llamar repetidamente a la ruta de inicio de sesión OAuth de Grafana con valores únicos, causando un crecimiento ilimitado de la memoria que puede agotar la memoria con el tiempo y bloquear la instancia de Grafana (denegación de servicio).

Information

Published : 2026-07-10 16:16

Updated : 2026-10-25 15:10

NVD link : CVE-2026-8609

Mitre link : CVE-2026-8609

CVE.ORG link : CVE-2026-8609

JSON object : View

Products Affected

grafana

grafana

CWE

CWE-400

Uncontrolled Resource Consumption

{"id": "CVE-2026-8609", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-8609", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-07-10T15:53:40.169487Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security@grafana.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.3, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "LOW", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 1.4, "exploitabilityScore": 3.9}, {"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 3.9}]}, "affected": [{"source": "security@grafana.com", "affectedData": [{"vendor": "Grafana", "product": "Grafana OSS", "versions": [{"status": "affected", "version": "11.6.0", "versionType": "semver", "lessThanOrEqual": "11.6.14"}, {"status": "affected", "version": "12.2.0", "versionType": "semver", "lessThanOrEqual": "12.2.8"}, {"status": "affected", "version": "12.3.0", "versionType": "semver", "lessThanOrEqual": "12.3.6"}, {"status": "affected", "version": "12.4.0", "versionType": "semver", "lessThanOrEqual": "12.4.3"}, {"status": "affected", "version": "13.0.0", "versionType": "semver", "lessThanOrEqual": "13.0.1"}], "defaultStatus": "unaffected"}]}], "published": "2026-07-10T16:16:39.510", "references": [{"url": "https://grafana.com/security/security-advisories/cve-2026-8609", "tags": ["Vendor Advisory"], "source": "security@grafana.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "security@grafana.com", "description": [{"lang": "en", "value": "CWE-400"}]}, {"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "description": [{"lang": "en", "value": "CWE-400"}]}], "descriptions": [{"lang": "en", "value": "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)."}, {"lang": "es", "value": "Un atacante no autenticado puede llamar repetidamente a la ruta de inicio de sesi\u00f3n OAuth de Grafana con valores \u00fanicos, causando un crecimiento ilimitado de la memoria que puede agotar la memoria con el tiempo y bloquear la instancia de Grafana (denegaci\u00f3n de servicio)."}], "lastModified": "2026-10-25T15:10:00.147", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:grafana:grafana:*:*:*:*:-:*:*:*", "vulnerable": true, "matchCriteriaId": "B154BC07-0914-4E25-9D84-FB64205493F7", "versionEndExcluding": "11.6.15", "versionStartIncluding": "11.6.0"}, {"criteria": "cpe:2.3:a:grafana:grafana:*:*:*:*:-:*:*:*", "vulnerable": true, "matchCriteriaId": "052CFAA8-0386-43DF-869A-643997178E8D", "versionEndExcluding": "12.2.9", "versionStartIncluding": "12.2.0"}, {"criteria": "cpe:2.3:a:grafana:grafana:*:*:*:*:-:*:*:*", "vulnerable": true, "matchCriteriaId": "C77AA4CC-A590-4948-A010-5A1154502E47", "versionEndExcluding": "12.3.7", "versionStartIncluding": "12.3.0"}, {"criteria": "cpe:2.3:a:grafana:grafana:*:*:*:*:-:*:*:*", "vulnerable": true, "matchCriteriaId": "F820291A-C1C6-4DBC-8064-6133F16547C4", "versionEndExcluding": "12.4.4", "versionStartIncluding": "12.4.0"}, {"criteria": "cpe:2.3:a:grafana:grafana:*:*:*:*:-:*:*:*", "vulnerable": true, "matchCriteriaId": "643002A3-545F-4605-AAAF-EF55C5B14392", "versionEndExcluding": "13.0.2", "versionStartIncluding": "13.0.0"}], "operator": "OR"}]}], "sourceIdentifier": "security@grafana.com"}