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CVE-2026-33378

🔶 medium
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Summary

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.

CVSS Score
6.5
Medium
EPSS Score
0.0
Exploit Probability
Published Date
2026-05-13
First Seen: 2026-05-17
📊 Relative Risk Intelligence

This CVE is Lower Risk - more severe than 47.8% of all 325,703 vulnerabilities in our database.

#169,901
Below average severity
Severity Percentile
🎯 CISA SSVC Assessment Updated: May 14, 2026
🔍 Exploitation Status
None
No known exploits
⚙️ Automatable
NO
Requires human interaction
💥 Technical Impact
Partial
Limited system impact
SSVC data provided by CISA
Last Modified 2026-05-28
Source NVD 🔗
CVSS Vector 3.1 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE IDs (Weakness Types)
CWE-400

📦 Affected Products 10

Vendor Product Status Affected Versions
grafana grafana Affected
> 8.0.0 < 11.6.14
grafana grafana Affected
> 12.0.0 < 12.2.8
grafana grafana Affected
> 12.3.0 < 12.3.6
grafana grafana Affected
> 12.4.0 < 12.4.3
grafana grafana Affected
v11.6.14
grafana grafana Affected
v12.2.8
grafana grafana Affected
v12.3.6
grafana grafana Affected
v12.4.3
grafana grafana Affected
v13.0.0
grafana grafana Affected
v13.0.1

🔗 References 1

https://grafana.com/security/security-advisories/cve...
Vendor Advisory

🔗 Related CVEs 6

CVE ID Severity CVSS EPSS Summary Published
CVE-2026-28374 🔶 medium 4.3 0.0 Editors could delete any annotation, even those they do not have read access to. The editor user cannot create or read t... 2026-05-13
CVE-2026-28376 🔶 medium 6.5 0.0 The Grafana Live push endpoint can be exploited to cause unbounded memory allocation by sending a large or streaming req... 2026-05-13
CVE-2026-28379 🔶 medium 6.5 0.0 A race condition in Grafana Live allows authenticated users with Viewer role to trigger a server crash by sending concur... 2026-05-13
CVE-2026-28380 🔶 medium 6.5 0.0 Any Editor could delete any snapshot, even if they have no access to read or write them. 2026-05-13
CVE-2026-28383 🔶 medium 6.5 0.0 A request to the Grafana plugin resources endpoint can cause unbounded memory allocation by reading the entire request b... 2026-05-13
CVE-2026-33376 ⚠️ high 7.4 0.0 When using an IPv6 allow-list for the Auth Proxy feature, it defaults to /32 addresses. Addresses specifying a mask expl... 2026-05-13
These CVEs affect the same products