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.

Exploitation none

Automatable no

Technical Impact partial

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.

OpenCVE Enrichment is a feature of OpenCVE that uses AI to automatically link vendors and products to CVEs. Learn more on GitHub.

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 cve-icon cve-icon
History

Tue, 13 Oct 2026 20:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

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
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

Sign in to view the affected projects.

cve-icon MITRE

Status: PUBLISHED

Assigner: GRAFANA

Published:

Updated: 2026-10-13T19:21:25.512Z

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

Link: CVE-2026-33374

cve-icon Vulnrichment

Updated: 2026-10-13T19:21:22.099Z

cve-icon NVD

Status : Received

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

Modified: 2026-10-13T20:17:28.793

Link: CVE-2026-33374

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-13T19:00:06Z

Weaknesses