What is the CVSS score of CVE-2026-27152?

CVE-2026-27152 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-2026-27152?

CVE-2026-27152 is a low-severity vulnerability in Discourse involving access control (CVSS 3.8).

How to fix or mitigate CVE-2026-27152?

During next maintenance window: Apply vendor patches when convenient. Verify access control controls are in place.

Discourse CVE-2026-27152

LOW

Improper Access Control (CWE-284)

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, DM communication-preference bypass when adding members via Chat::AddUsersToChannel - a user could add targets who have blocked/ignored/muted them to an existing DM channel, bypassing per-recipient PM restrictions that are enforced during DM channel creation. Versions 2025.12.2, 2026.1.1, and 2026.2.0 patch the issue. 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 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-2026-27152 vulnerability details – vuln.today

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