CVE-2026-45780
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.
Weakness
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
- discourse discourse
References
- 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
Find the bug before an attacker does.
Sign in with GitHub and run your first audit in under a minute. The free plan needs no credit card.