What is CVE-2026-27162?

CVE-2026-27162 is a medium-severity vulnerability in Discourse, classified under Information Disclosure. CVSS score: 4.9/10. Published 2026-02-26.

How severe is CVE-2026-27162?

Medium severity. CVSS v3 base score is 4.9 out of 10.

Information disclosure in Discourse

CVE-2026-27162

Discourse is an open source discussion platform. Prior to versions 2025.12.2, 2026.1.1, and 2026.2.0, `posts_nearby` was checking topic access but then returning all posts regardless of type, including whispers that should only be visible to whisperers. Use `Post.secured(guardian)` to properly filter post types based on user permissions. Versions 2025.12.2, 2026.1.1, and 2026.2.0 patch the issue. No known workarounds are available.

Vulnerability class: Information Disclosure

EPSS: 0.002 (13.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.9 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/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-200 — Information Disclosure

References

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

Frequently asked questions

What is CVE-2026-27162?: CVE-2026-27162 is a medium-severity vulnerability in Discourse, classified under Information Disclosure. CVSS score: 4.9/10. Published 2026-02-26.
How severe is CVE-2026-27162?: Medium severity. CVSS v3 base score is 4.9 out of 10.