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.

The remote openSUSE 16 host has a package installed that is affected by multiple vulnerabilities as referenced in the openSUSE-SU-2026:20940-1 advisory.

    Changes in grafana:

    - CVE-2026-39821: Fix validation bypass and privilege escalation by       updating golang.org/x/net to version 0.55.0 (bsc#1266600)

    - Update to version 11.6.14+security-04:
      Security:
      * CVE-2026-28374: Fix insecure direct object reference in         Annotations API (bsc#1265290)
      * CVE-2026-28376: Fix unbounded memory allocation in Grafana Live         push endpoint (bsc#1265289)
      * CVE-2026-28383: Fix unbounded memory allocation in Grafana         plugin resources (bsc#1265286)
      * CVE-2026-28380: Fix broken access control in Snapshot API         (bsc#1265287)
      * CVE-2026-33376: Fix Auth Proxy IPv6 whitelist bypass         (bsc#1265285)
      * CVE-2026-28379: Fix viewer-triggered race condition in         Grafana Live (bsc#1265288)
      * CVE-2026-33377: Fix dashboard Editor Privilege Escalation         (bsc#1265284)
      * CVE-2026-33378: Fix OOM exception in Grafana Data Source Plugin         (bsc#1265283)
      * CVE-2026-33381: Prevent users from generating Service Account         tokens after permissions removal (bsc#1265281)
      * CVE-2026-33380: Fix vulnerability in SQL Expressions allowing         an authenticated attacker to read arbitrary files from the         Grafana servers filesystem (bsc#1265282)

    - CVE-2026-34986: Fix panic in JWE decryption (bsc#1262950)
    - CVE-2026-41602: Fix Integer Overflow or Wraparound vulnerability       in Apache Thrift (bsc#1263501)

    - CVE-2026-26958: Bump filippo.io/edwards25519 to version 1.1.1       (bsc#1258595)
    - CVE-2026-21725: Fix missing UID when deleting datasource by name       (bsc#1258873)

    - Update to version 11.6.14+security-01:
      Security:
      * CVE-2026-33375: Fix denial of Service via out-of-memory         exhaustion in MSSQL data source plugin (bsc#1260881)

    - Update to version 11.6.14:
      Security:
      * CVE-2026-27876: Fix remote arbitrary code execution via chained         SQL Expressions (bsc#1261025)
      * CVE-2026-27877: Fix information disclosure of data-source         passwords via public dashboards (bsc#1261026)
      * CVE-2026-28375: Fix denial of service via testdata data-source         (bsc#1261029)
      * CVE-2026-27879: Fix denial of service via resample query         (bsc#1261027)
      * CVE-2026-33186: Fix authorization bypass due to improper         validation of the HTTP/2 :path pseudo-header (bsc#1260263)
      * CVE-2026-21724: Fix authorization bypass allows modification of         protected webhook URLs (bsc#1260878)

    - Update to version 11.6.13:
      Enhancement:
      * Wire the public dashboard service to the HTTP server

    - Update to version 11.6.12:
      Enhancement:
      * Update authentication redirect logic       Bug fix:
      * Fix single panel render with variable references

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The version of FreeBSD installed on the remote host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the 9bcc3279-5901-11f1-b525-3c7c3fba4204 advisory.

    https://grafana.com/security/security-advisories/cve-2026-33375 reports:
    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.

Tenable has extracted the preceding description block directly from the FreeBSD security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Severity
321072	openSUSE 16 Security Update : grafana (openSUSE-SU-2026:20940-1)	Nessus	SuSE Local Security Checks	medium
317067	FreeBSD : Grafana -- Grafana MSSQL Data Source Plugin: Restriction Bypass Leading to OOM DoS (9bcc3279-5901-11f1-b525-3c7c3fba4204)	Nessus	FreeBSD Local Security Checks	medium

Detections

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CVE-2026-33375

medium

Tenable Plugins

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medium