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4.3

Discourse lets logged‑in users view draft titles

CVE-2026-32951 · published 7 months ago
Summary

In certain recent versions of the Discourse discussion platform, a signed‑in user could see the titles of draft topics that are meant to be private by sending a special link with a category identifier. This could expose internal planning information. Updating to the latest Discourse release (2026.1.3, 2026.2.2, or 2026.3.0) resolves the issue.

What to do
  • Update discourse to version 2026.2.2.
Affected software
Ecosystem VendorProductAffected versions
Bitnami – discourse >= 2026.2.0, < 2026.2.2
Fix: upgrade to 2026.2.2
– discourse discourse >= 2026.1.0, < 2026.1.3
>= 2026.2.0, < 2026.2.2
2026.3.0
cpe:2.3:a:discourse:discourse:*:*:*:*:latest:*:*:*
Original advisory text
Discourse: Authorization bypass in oneboxer via user-controlled category id
Discourse is an open-source discussion platform. From versions 2026.1.0-latest to before 2026.1.3, 2026.2.0-latest to before 2026.2.2, and 2026.3.0-latest to before 2026.3.0, an authenticated user can obtain shared draft topic titles by sending an inline onebox request with a category_id parameter matching the shared drafts category. This issue has been patched in versions 2026.1.3, 2026.2.2, and 2026.3.0.
References
Fix within
Internet-facing 60 days
Internal At next upgrade
  • Not known to be exploited
  • Needs hands-on effort to exploit
  • Gives an attacker partial control
Severity
4.3 Medium
Exploitation
<1% chance of attack within 30 days
Type
CWE-200Information Exposure
Timeline
Published31 Mar 2026
Updated4 Nov 2026
First seen31 Mar 2026
Sources
CVE-2026-32951 · NVD
BIT-discourse-2026-32951 · OSV
CVE-2026-32951 · OSV
GHSA-v93g-8f4f-4rgm · GHSA
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