CVE-2026-33374 - Vulnerability Details - OpenCVE

The Prometheus rule conversion API endpoints in Grafana do not limit request body size, allowing authenticated users to trigger unbounded memory allocations that can crash the server through out-of-memory conditions.

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

Grafana

Grafana Enterprise

unaffected

Version	Status	Constraints
`12.0.0`	affected	≤ 12.3.11
`12.4.0`	affected	< 12.4.13
`13.0.0`	affected	< 13.0.11
`13.1.0`	affected	< 13.1.8
`13.2.0`	affected	< 13.2.4

Grafana

Grafana OSS

unaffected

Version	Status	Constraints
`12.0.0`	affected	≤ 12.3.11
`12.4.0`	affected	< 12.4.13
`13.0.0`	affected	< 13.0.11
`13.1.0`	affected	< 13.1.8
`13.2.0`	affected	< 13.2.4

No data.

No data.

No data.

Project Subscriptions

No data.

Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References

Link	Providers
https://grafana.com/security/security-advisories/cve-2026-33374

History

Tue, 13 Oct 2026 17:30:00 +0000

Type	Values Removed	Values Added
Description		The Prometheus rule conversion API endpoints in Grafana do not limit request body size, allowing authenticated users to trigger unbounded memory allocations that can crash the server through out-of-memory conditions.
Title		Unbounded memory allocation in the Prometheus rule conversion API
Weaknesses		CWE-400 CWE-770 CWE-789
References		https://grafana.com/security/security-advisories/cve-2026-33374
Metrics		cvssV3_1 `{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'}`

Projects

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MITRE

Status: PUBLISHED

Assigner: GRAFANA

Published: 2026-10-13T17:05:49.782Z

Updated: 2026-10-13T17:05:49.782Z

Reserved: 2026-03-19T07:55:06.977Z

Link: CVE-2026-33374

Vulnrichment

No data.

NVD

Status : Received

Published: 2026-10-13T18:17:23.720

Modified: 2026-10-13T18:17:23.720

Link: CVE-2026-33374

Redhat

No data.

OpenCVE Enrichment

No data.

Weaknesses

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