What is the CVSS score of CVE-2026-27150?

CVE-2026-27150 has a CVSS 3.1 base score of 3.8 (Low). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:N. EPSS exploitation probability: 0.0%.

Which versions of Discourse are affected by CVE-2026-27150?

CVE-2026-27150 is a low-severity vulnerability in Discourse involving missing authorization (CVSS 3.8).

How to fix or mitigate CVE-2026-27150?

During next maintenance window: Apply vendor patches when convenient. Monitor vendor channels for updates.

Discourse CVE-2026-27150

LOW

Missing Authorization (CWE-862)

2026-02-26 security-advisories@github.com

Authentication Bypass Discourse

3.8

CVSS 3.1 · GitHub Advisory

Severity by source

GitHub Advisory PRIMARY

3.8 LOW

AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:N

Primary rating from GitHub Advisory · only source for this CVE.

CVSS VectorGitHub Advisory

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

High

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

Low

Availability

None

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 21:56 vuln.today

CVE Published

Feb 26, 2026 - 21:28 nvd

LOW 3.8

DescriptionGitHub Advisory

Discourse is an open source discussion platform. Prior to versions 2025.12.2, 2026.1.1, and 2026.2.0, missing validate_before_create authorization in Data Explorer's QueryGroupBookmarkable allows any logged-in user to create bookmarks for query groups they don't have access to, enabling metadata disclosure via bookmark reminder notifications. Versions 2025.12.2, 2026.1.1, and 2026.2.0 fix this issue and also make sure validate_before_create throws NotImplementedError in BaseBookmarkable if not implemented, to prevent similar issues in the future. No known workarounds are available.

AnalysisAI

Discourse is an open source discussion platform. [CVSS 3.8 LOW]

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Vulnerability AssessmentAI

Risk Assessment	CVSS 3.8 (LOW). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario	An attacker (requires authentication) could exploit this vulnerability to compromise the affected system.
Remediation	Monitor vendor advisories for a patch. … Detailed patch versions, workarounds, and compensating controls in full report.

Recommended ActionAI

During next maintenance window: Apply vendor patches when convenient. …

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CVE-2026-27150 vulnerability details – vuln.today

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