CVE-2026-33374CWE-400CWE-770CWE-789denial-of-service

CVE-2026-33374

Medium · published October 13, 2026

CVSS v3.1
6.5
EPSS
0%
Percentile
29.4
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
6.5 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.00367 · 29.4th percentile
Weaknesses
CWE-400 · Uncontrolled Resource Consumption; CWE-770 · Allocation of Resources Without Limits or Throttling; CWE-789 · Memory Allocation with Excessive Size Value
Published
2026-10-13T22:17Z
References (1)
https://grafana.com/security/security-advisories/cve-2026-33374 · [email protected]
EPSS history
Timeline
  • 15 OCT 03:31Z
    EPSS moved — → 0%
    epss
  • 13 OCT 17:05Z
    Unbounded memory allocation in the Prometheus rule conversion API
    cvelistv5
  • 13 OCT 17:05Z
    Unbounded memory allocation in the Prometheus rule conversion API
    cvelistv5