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Fencer Vulns
medium 6.5

CVE-2026-33378 json

Grafana Data Source Plugin: DoS (OOM) via Negative Interval Injection in $__timeGroup Macro

published 2026-05-13 5 mo ago modified 2026-10-26 13 d ago also BIT-grafana-2026-33378 , EUVD-2026-30144

cvss
6.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 26%
public exploits
0
none known

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.

Patch / fix

  • bitnami grafana 11.6.14, 12.2.8, 12.3.6, 12.4.3, 13.0.1
  • Grafana Grafana OSS 11.6.14+security-04, 12.2.8+security-04, 12.3.6+security-04, 12.4.3+security-02, 13.0.1+security-01
  • grafana12.4 hummingbird 1 12.4.10-0.6.hum1
  • grafana13.2 hummingbird 1 13.2.1-0.5.hum1
  • grafana13.1 hummingbird 1 13.1.6-0.1.hum1

red hat advisories RHSA-2026:68821RHSA-2026:68778RHSA-2026:68767

  • grafana SLE Module for Package Hub 15 SP7 12.4.5-150200.3.91.1
  • uyuni-tools Multi-Linux Manager Server Extension for SLE 5.1, Multi-Linux Manager Proxy Extension for SLE 5.1 5.1.29-150700.3.26.1
  • suse-multi-linux-manager-5.1-s390x-server-image Multi-Linux Manager Server Extension for SLE 5.1 5.1.4-8.20.34
  • suse-multi-linux-manager-5.1-x86_64-server-image Multi-Linux Manager Server Extension for SLE 5.1 5.1.4-8.20.34
  • suse-multi-linux-manager-5.1-aarch64-server-image Multi-Linux Manager Server Extension for SLE 5.1 5.1.4-8.20.34
  • suse-multi-linux-manager-5.1-ppc64le-server-image Multi-Linux Manager Server Extension for SLE 5.1 5.1.4-8.20.34
  • suse-multi-linux-manager-5.1-s390x-proxy-ssh-image Multi-Linux Manager Proxy Extension for SLE 5.1 5.1.4-8.20.12
  • suse-multi-linux-manager-5.1-x86_64-proxy-ssh-image Multi-Linux Manager Proxy Extension for SLE 5.1 5.1.4-8.20.12

suse advisories SUSE-SU-2026:3718-1SUSE-SU-2026:2774-1SUSE-SU-2026:2768-1

  • grafana openSUSE Leap 16.0 11.6.14+security04-bp160.1.1
  • grafana openSUSE Tumbleweed 11.6.14+security04-1.1

opensuse advisories openSUSE-SU-2026:20940-1openSUSE-SU-2026:10932-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-33378 updated cvss 6.5

grafana: Grafana: Denial of Service due to Out of Memory via $__timeGroup macro

  • Red Hat Hardened Images grafana13.1 13.1.6-0.1.hum1, grafana13.2 13.2.1-0.5.hum1, grafana12.4 12.4.10-0.6.hum1
    fixed: vendor fix RHSA-2026:68821
  • Red Hat Hardened Images hi/grafana
    not affected: component not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
5 mo ago

Exploit prediction

0.33% chance of exploitation in the next 30 days, higher than 26% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
OSV 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected packages

ecosystem package affected fixed in
bitnami grafana
>=8.0.0, <11.6.14
>=12.0.0, <12.2.8
>=12.3.0, <12.3.6
>=12.4.0, <12.4.3
>=13.0.0, <13.0.1
11.6.14
12.2.8
12.3.6
12.4.3
13.0.1

Affected products

  • Grafana Grafana OSS

Classification

Weakness
  • CWE-400 Uncontrolled Resource Consumption

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.