Unrated severityNVD Advisory· Published Jul 9, 2026· Updated Jul 14, 2026
Discourse: Private event sample invitees are serialized to non-invited event viewers
CVE-2026-45780
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.
Affected products
2- Range: before 2026.6.0, 2026.5.1, 2026.4.2, and 2026.1.5
Patches
Vulnerability mechanics
References
9- github.com/discourse/discourse/commit/37969503f20369eb1712b7b88daedcfb4f63f5f1mitrex_refsource_MISC
- github.com/discourse/discourse/commit/4d46638041b5f3d1e1f7f6f6f19c1df3bd65a586mitrex_refsource_MISC
- github.com/discourse/discourse/commit/6457ab71f36a2d1440fe96af0a2593897844b023mitrex_refsource_MISC
- github.com/discourse/discourse/commit/7deb4b6963442569357b41e61febe37594e5e730mitrex_refsource_MISC
- github.com/discourse/discourse/releases/tag/v2026.1.5mitrex_refsource_MISC
- github.com/discourse/discourse/releases/tag/v2026.4.2mitrex_refsource_MISC
- github.com/discourse/discourse/releases/tag/v2026.5.1mitrex_refsource_MISC
- github.com/discourse/discourse/releases/tag/v2026.6.0mitrex_refsource_MISC
- github.com/discourse/discourse/security/advisories/GHSA-22v7-6wgj-g9f7mitrex_refsource_CONFIRM
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