Vulnerability 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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Discourse | Discourse | >= 2026.1.0, < 2026.1.5 |
Related Weaknesses (CWE)
References
- https://github.com/discourse/discourse/commit/37969503f20369eb1712b7b88daedcfb4fPatch
- https://github.com/discourse/discourse/commit/4d46638041b5f3d1e1f7f6f6f19c1df3bdPatch
- https://github.com/discourse/discourse/commit/6457ab71f36a2d1440fe96af0a25938978Patch
- https://github.com/discourse/discourse/commit/7deb4b6963442569357b41e61febe37594Patch
- https://github.com/discourse/discourse/releases/tag/v2026.1.5Release Notes
- https://github.com/discourse/discourse/releases/tag/v2026.4.2Release Notes
- https://github.com/discourse/discourse/releases/tag/v2026.5.1Release Notes
- https://github.com/discourse/discourse/releases/tag/v2026.6.0Release Notes
- https://github.com/discourse/discourse/security/advisories/GHSA-22v7-6wgj-g9f7Vendor Advisory
FAQ
What is CVE-2026-45780?
CVE-2026-45780 is a vulnerability with a CVSS score of 5.3 (MEDIUM). 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 us...
How severe is CVE-2026-45780?
CVE-2026-45780 has been rated MEDIUM with a CVSS base score of 5.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-45780?
Check the references section above for vendor advisories and patch information. Affected products include: Discourse Discourse.