What is the CVSS score of CVE-2026-27149?

CVE-2026-27149 has a CVSS 3.1 base score of 6.5 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N. EPSS exploitation probability: 0.0%.

Which versions of Discourse are affected by CVE-2026-27149?

Organizations using Discourse should be aware of notable risk from CVE-2026-27149, a SQL injection vulnerability rated CVSS 6.5.

How to fix or mitigate CVE-2026-27149?

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Validate input sanitization for user-controlled parameters.

Discourse CVE-2026-27149

MEDIUM

SQL Injection (CWE-89)

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

SQLi Discourse

6.5

CVSS 3.1 · GitHub Advisory

Severity by source

GitHub Advisory PRIMARY

6.5 MEDIUM

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

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

CVSS VectorGitHub Advisory

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 21:56 vuln.today

CVE Published

Feb 26, 2026 - 21:28 nvd

MEDIUM 6.5

DescriptionGitHub Advisory

Discourse is an open source discussion platform. Prior to versions 2025.12.2, 2026.1.1, and 2026.2.0, SQL injection in PM tag filtering (list_private_messages_tag) allows bypassing tag filter conditions, potentially disclosing unauthorized private message metadata. Versions 2025.12.2, 2026.1.1, and 2026.2.0 patch the issue. No known workarounds are available.

AnalysisAI

SQL injection in Discourse's private message tag filtering allows authenticated users to bypass tag restrictions and read unauthorized private message metadata. Affected versions prior to 2025.12.2, 2026.1.1, and 2026.2.0 expose sensitive conversation information to users who should not have access. No patch workaround exists for unpatched installations.

Technical ContextAI

Classified as CWE-89 (SQL Injection). Affects Discourse. Discourse is an open source discussion platform. Prior to versions 2025.12.2, 2026.1.1, and 2026.2.0, SQL injection in PM tag filtering (list_private_messages_tag) allows bypassing tag filter conditions, potentially disclosing unauthorized private message metadata. Versions 2025.12.2, 2026.1.1, and 2026.2.0 patch the issue. No known workarounds are available.

RemediationAI

Monitor vendor advisories for a patch. Use parameterized queries. Implement input validation. Restrict network access to the affected service where possible.