CVE-2026-33378— Grafana Data Source Plugin: DoS (OOM) via Negative Interval Injection in $__timeGroup Macro
Possible ATT&CK Techniques 2AI
T1499 · Endpoint Denial of Service T1190 · Exploit Public-Facing ApplicationAffected Version Matrix 10
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Grafana | Grafana OSS | 8.0.0≤ 11.6.14 | affected |
11.6.14< 11.6.14+security-04 | affected | ||
12.0.0≤ 12.2.8 | affected | ||
12.2.8< 12.2.8+security-04 | affected | ||
12.3.0≤ 12.3.6 | affected | ||
12.3.6< 12.3.6+security-04 | affected | ||
12.4.0≤ 12.4.3 | affected | ||
12.4.3< 12.4.3+security-02 | affected | ||
| … +2 more rows | |||
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I. Basic Information for CVE-2026-33378
Vulnerability Information
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Vulnerability Title
Grafana Data Source Plugin: DoS (OOM) via Negative Interval Injection in $__timeGroup Macro
Source: NVD (National Vulnerability Database)
Vulnerability Description
Using the $__timeGroup macro, one can achieve an OOM by overloading the server. This requires a SQL datasource. If the server is set up to auto-restart, the impact is minimal or non-existent, as the attack can take upwards of half an hour to crash the server.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
Grafana OSS 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Grafana OSS是Grafana开源的一个可视化仪表盘。 Grafana OSS存在安全漏洞，该漏洞源于使用$__timeGroup宏可能导致服务器过载，引发OOM问题。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Grafana | Grafana OSS | 8.0.0 ~ 11.6.14 | - |
II. Public POCs for CVE-2026-33378
| # | POC Description | Source Link | Shenlong Link |
|---|
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No public POC found.
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Same Patch Batch · Grafana · 2026-05-13 · 10 CVEs total
| CVE-2026-33376 | 7.4 HIGH | Auth Proxy IPv6 whitelist bypass |
| CVE-2026-33377 | 7.1 HIGH | Dashboard Import Overwrites ACL — Editor Privilege Escalation to Dashboard Admin |
| CVE-2026-28379 | 6.5 MEDIUM | Viewer-triggered race condition in Grafana Live leads to complete server crash |
| CVE-2026-28380 | 6.5 MEDIUM | BAC in Snapshot API allows deletion of unauthorized dashboard snapshots |
| CVE-2026-28383 | 6.5 MEDIUM | Grafana plugin resources can lead to unbounded memory allocation |
| CVE-2026-28376 | 6.5 MEDIUM | Grafana Live push endpoint allows unbounded memory allocation leading to OOM |
| CVE-2026-33380 | 6.3 MEDIUM | SQL Expressions Read File From Disk |
| CVE-2026-33381 | 5.9 MEDIUM | Users can generate Service Account tokens after permissions removal |
| CVE-2026-28374 | 4.3 MEDIUM | IDOR in Annotations API allows unprivileged users to DELETE annotation |
IV. Related Vulnerabilities
Same product: Grafana OSS
- CVE-2026-28374
IDOR in Annotations API allows unprivileged users to DELETE - CVE-2026-28383
Grafana plugin resources can lead to unbounded memory alloca - CVE-2026-33376
Auth Proxy IPv6 whitelist bypass - CVE-2026-33380
SQL Expressions Read File From Disk - CVE-2026-33381
Users can generate Service Account tokens after permissions
Same vendor: Grafana
- CVE-2026-28374
IDOR in Annotations API allows unprivileged users to DELETE - CVE-2026-28383
Grafana plugin resources can lead to unbounded memory alloca - CVE-2026-33376
Auth Proxy IPv6 whitelist bypass - CVE-2026-33380
SQL Expressions Read File From Disk - CVE-2026-28380
BAC in Snapshot API allows deletion of unauthorized dashboar
V. Comments for CVE-2026-33378
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