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Fencer Vulns
medium 6.5

CVE-2026-33375 json

Grafana MSSQL Data Source Plugin: Restriction Bypass Leading to OOM DoS

published 2026-03-26 7 mo ago modified 2026-09-08 2 mo ago also BIT-grafana-2026-33375 , EUVD-2026-16351

cvss
6.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.5%
EPSS 0.5% chance of exploitation in 30 days, percentile 39%
public exploits
0
none known

Summary

The Grafana MSSQL data source plugin contains a logic flaw that allows a low-privileged user (Viewer) to bypass API restrictions and trigger a catastrophic Out-Of-Memory (OOM) memory exhaustion, crashing the host container.

Patch / fix

  • bitnami grafana 11.6.14, 12.1.10, 12.2.8, 12.3.6, 12.4.2
  • Grafana Grafana OSS 11.6.14+security-01, 12.1.10+security-01, 12.2.8+security-01, 12.3.6+security-01, 12.4.2
  • grafana openSUSE Leap 16.0 11.6.14+security04-bp160.1.1
  • grafana openSUSE Tumbleweed 11.6.14+security01-1.1

opensuse advisories openSUSE-SU-2026:20940-1openSUSE-SU-2026:10601-1

  • grafana Alpine 3.23 12.2.8-r0
  • grafana Alpine 3.24 12.4.3-r0

alpine advisories ALPINE-CVE-2026-33375

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

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-2026-33375 updated cvss 6.5

Grafana MSSQL Data Source Plugin: Grafana MSSQL Data Source Plugin: Denial of Service via Out-Of-Memory exhaustion

  • Red Hat Enterprise Linux 8 grafana, grafana-loki, grafana-mssql, grafana-mysql, grafana-selinux, grafana-graphite, +8 more Red Hat Enterprise Linux 9 grafana, grafana-selinux Red Hat Enterprise Linux 10 grafana
    not affected: vulnerable code 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
7 mo ago

Exploit prediction

0.45% chance of exploitation in the next 30 days, higher than 39% 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
>=11.6.0, <11.6.14
>=12.1.0, <12.1.10
>=12.2.0, <12.2.8
>=12.3.0, <12.3.6
>=12.4.0, <12.4.2
11.6.14
12.1.10
12.2.8
12.3.6
12.4.2

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: NVD has incorrect affected ranges. They incorrectly interpreted the fixed ranges as affected ranges.