CVE-2026-21728

Tempo queries with large limits can cause large memory allocations which can impact the availability of the service, depending on its deployment strategy. Mitigation can be done by setting max_result_limit in the search config, e.g. to 262144 (2^18). Alternatively, automatically restart the service.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://grafana.com/security/security-advisories/cve-2026-21728	Broken Link
https://access.redhat.com/errata/RHSA-2026:21769
https://access.redhat.com/errata/RHSA-2026:22347
https://access.redhat.com/errata/RHSA-2026:22423
https://access.redhat.com/errata/RHSA-2026:23345
https://access.redhat.com/errata/RHSA-2026:24503
https://access.redhat.com/security/cve/CVE-2026-21728
https://bugzilla.redhat.com/show_bug.cgi?id=2461395
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-21728.json

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:grafana:tempo::::::::
	cpe:2.3:a:grafana:tempo::::::::
	cpe:2.3:a:grafana:tempo::::::::

History

26 Oct 2026, 21:10

Type	Values Removed	Values Added
Summary		(es) Las consultas de Tempo con límites grandes pueden causar grandes asignaciones de memoria, lo que puede impactar la disponibilidad del servicio, dependiendo de su estrategia de despliegue. La mitigación se puede realizar configurando max_result_limit en la configuración de búsqueda, por ejemplo, a 262144 (2^18).

Information

Published : 2026-04-24 09:16

Updated : 2026-10-26 21:10

NVD link : CVE-2026-21728

Mitre link : CVE-2026-21728

CVE.ORG link : CVE-2026-21728

JSON object : View

Products Affected

grafana

tempo

CWE

CWE-400

Uncontrolled Resource Consumption

CWE-770

Allocation of Resources Without Limits or Throttling

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impact the availability of the service, depending on its deployment strategy.\n\nMitigation can be done by setting max_result_limit in the search config, e.g. to 262144 (2^18). Alternatively, automatically restart the service."}, {"lang": "es", "value": "Las consultas de Tempo con l\u00edmites grandes pueden causar grandes asignaciones de memoria, lo que puede impactar la disponibilidad del servicio, dependiendo de su estrategia de despliegue.\n\nLa mitigaci\u00f3n se puede realizar configurando max_result_limit en la configuraci\u00f3n de b\u00fasqueda, por ejemplo, a 262144 (2^18)."}], "lastModified": "2026-10-26T21:10:00.170", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:grafana:tempo:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "AE74525D-4401-4907-BB5F-E4FD2595CA5E", "versionEndExcluding": "2.8.4", "versionStartIncluding": "1.3.0"}, {"criteria": "cpe:2.3:a:grafana:tempo:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "4F731ED3-2882-414C-B5FE-679B76A751A4", "versionEndExcluding": "2.9.2", "versionStartIncluding": "2.9.0"}, {"criteria": "cpe:2.3:a:grafana:tempo:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "A90B7E68-DFF4-449F-A145-C1ABB0184B2E", "versionEndExcluding": "2.10.2", "versionStartIncluding": "2.10.0"}], "operator": "OR"}]}], "sourceIdentifier": "security@grafana.com"}