CVE-2026-45780
Discourse: Private event sample invitees are serialized to non-invited event viewers
- State
- Published
- Severity
- 5.3 Medium
- Published
- Jul 9, 2026
- Updated
- Jul 14, 2026
- Reserved
- May 13, 2026
Description
Discourse is an open-source discussion platform. Prior to 2026.6.0, 2026.5.1, 2026.4.2, and 2026.1.5, EventSerializer could expose invited group names, sample invitees, and attendance statistics to users who could view the topic but were not entitled to view the private event invitee list. This issue is fixed in versions 2026.6.0, 2026.5.1, 2026.4.2, and 2026.1.5.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 5.3 Medium | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N | GitHub_M |
Weaknesses
- CWE-200 Exposure of Sensitive Information to an Unauthorized Actor
Affected Products
| Product | Versions |
|---|---|
discoursediscourse |
|
References
- https://github.com/discourse/discourse/security/advisories/GHSA-22v7-6wgj-g9f7
- https://github.com/discourse/discourse/commit/37969503f20369eb1712b7b88daedcfb4f63f5f1
- https://github.com/discourse/discourse/commit/4d46638041b5f3d1e1f7f6f6f19c1df3bd65a586
- https://github.com/discourse/discourse/commit/6457ab71f36a2d1440fe96af0a2593897844b023
- https://github.com/discourse/discourse/commit/7deb4b6963442569357b41e61febe37594e5e730
- https://github.com/discourse/discourse/releases/tag/v2026.1.5
- https://github.com/discourse/discourse/releases/tag/v2026.4.2
- https://github.com/discourse/discourse/releases/tag/v2026.5.1
- https://github.com/discourse/discourse/releases/tag/v2026.6.0
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