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CVE-2026-45780Discourse: Private event sample invitees are serialized to non-invited event viewers
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.
5.3 MEDIUMEPSS 0.49%Not in KEVNVD: Analyzed
Overview
Severity
| Score | Severity | Version | Vector String |
|---|---|---|---|
| 5.3 | MEDIUM | 3.1GitHub_M (CNA) | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N |
| 4.3 | MEDIUM | 3.1NVD | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N |
Details
- CVE ID
- CVE-2026-45780
- Status
- Analyzed
- Assigner (CNA)
- GitHub_M
- Published
- Jul 9, 2026
- Last modified
- 2026-07-14 20:43 UTC
- Weaknesses
- CWE-200 · Exposure of Sensitive Information to an Unauthorized Actor
Affected Products
As published by the CNA in the CVE record.
discoursediscourse3 version ranges
- >= 2026.1.0-latest, < 2026.1.5
- >= 2026.4.0-latest, < 2026.4.2
- >= 2026.5.0-latest, < 2026.5.1
References
- github.com https://github.com/discourse/discourse/commit/37969503f20369eb1712b7b88daedcfb4f63f5f1
- github.com https://github.com/discourse/discourse/commit/4d46638041b5f3d1e1f7f6f6f19c1df3bd65a586
- github.com https://github.com/discourse/discourse/commit/6457ab71f36a2d1440fe96af0a2593897844b023
- github.com https://github.com/discourse/discourse/commit/7deb4b6963442569357b41e61febe37594e5e730
- github.com https://github.com/discourse/discourse/releases/tag/v2026.1.5
- github.com https://github.com/discourse/discourse/releases/tag/v2026.4.2
- github.com https://github.com/discourse/discourse/releases/tag/v2026.5.1
- github.com https://github.com/discourse/discourse/releases/tag/v2026.6.0
- github.com https://github.com/discourse/discourse/security/advisories/GHSA-22v7-6wgj-g9f7