What is CVE-2026-27149?

CVE-2026-27149 is a medium-severity vulnerability in Discourse, classified under SQL Injection. CVSS score: 6.5/10. Published 2026-02-26.

How severe is CVE-2026-27149?

Medium severity. CVSS v3 base score is 6.5 out of 10.

SQL Injection in Discourse

CVE-2026-27149

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.

Vulnerability class: SQL Injection

EPSS: 0.002 (13.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.

Affected products

Discourse — versions >= 2026.2.0-latest, < 2026.2.0, >= 2026.1.0-latest, < 2026.1.1, 2026.2.0

Weakness classification (CWE)

CWE-89 — SQL Injection

References

security-advisories@github.com (x_refsource_CONFIRM, Vendor Advisory)

Frequently asked questions

What is CVE-2026-27149?: CVE-2026-27149 is a medium-severity vulnerability in Discourse, classified under SQL Injection. CVSS score: 6.5/10. Published 2026-02-26.
How severe is CVE-2026-27149?: Medium severity. CVSS v3 base score is 6.5 out of 10.