---
id: CVE-2026-33374
title: >-
  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.
summary: >-
  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.
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-400
  - CWE-770
  - CWE-789
published: '2026-10-13'
updated: '2026-10-13'
sourceUpdated: '2026-10-13T20:17:28.793'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-33374'
references:
  - url: 'https://grafana.com/security/security-advisories/cve-2026-33374'
    label: security@grafana.com
tags:
  - nvd
ingestedAt: '2026-10-13T18:41:42.743Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.