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Back to active CVEs
Medium · CVSS 6.5CVE-2026-33374

Unbounded memory allocation in the Prometheus rule conversion APICVE-2026-33374

Answer in brief

CVE-2026-33374 records a Medium severity (CVSS 6.5) vulnerability in Unbounded memory allocation in the Prometheus rule conversion API. The current sources do not mark it as known exploited. The current feed maps Grafana/Grafana Enterprise (generic), Grafana/Grafana OSS (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Oct 13, 2026Updated Oct 13, 2026Source checked Oct 13, 2026First seen by HOL Oct 13, 2026Material review Oct 13, 2026
Upstream Advisory

Key facts

Risk
Medium · CVSS 6.5
Exploitation
Not marked as known exploited
Affected software
2 mapped packages or products
Fix availability
Available

Why this deserves its current priority

CVSS is 6.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Grafana/Grafana Enterprise (generic), Grafana/Grafana OSS (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
Grafana/Grafana Enterprisegeneric>=12.0.0 <=12.3.11 || >=12.4.0 <12.4.13 || >=13.0.0 <13.0.11 || >=13.1.0 <13.1.8 || >=13.2.0 <13.2.412.4.13, 13.0.11, 13.1.8, 13.2.4
Grafana/Grafana OSSgeneric>=12.0.0 <=12.3.11 || >=12.4.0 <12.4.13 || >=13.0.0 <13.0.11 || >=13.1.0 <13.1.8 || >=13.2.0 <13.2.412.4.13, 13.0.11, 13.1.8, 13.2.4

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Grafana/Grafana Enterprise, Grafana/Grafana OSS.
  2. 2Review the reported fix. Update Grafana/Grafana Enterprise to 12.4.13; Grafana/Grafana OSS to 12.4.13 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Oct 13, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Oct 13, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Oct 13, 2026

Sources and claim methodology

  • Source referencegrafana.com
Upstream source 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.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • Git Sync connection configuration can be modified with read-only accessSame grafana/grafana enterprise package
  • Azure Monitor data source resource proxy allows calls to arbitrary Azure Resource Manager APIsSame grafana/grafana enterprise package
  • Git Sync memory exhaustion via a malicious Git serverSame grafana/grafana enterprise package
  • odt2spip < 4.4.0 OS Command Injection via Document FilenameSame generic ecosystem
  • Docker Hub account conversion could reassign an active personal access token to another userSame generic ecosystem
  • dataclasses-avroschema allows code injection through generated field-default literalsSame generic ecosystem

Record context

Vulnerability class
Vulnerability
EPSS
Not reported
CWE IDs
CWE-770, CWE-400, CWE-789
Source
CVE List V5
Source checked
Oct 13, 2026
References
1 linked source
Open source record