PT-2026-56994 · Discourse · Discourse

Published 2026-07-09 · Updated 2026-07-09 · CVE-2026-45780

NVD

CVSS v3.1

5.3

Medium

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

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.

Fix

Information Disclosure

Weakness Enumeration

CWE-200

Related Identifiers

CVE-2026-45780

Affected Products

Discourse

References · 10

• https://nvd.nist.gov/vuln/detail/CVE-2026-45780 · Security Note
• https://github.com/discourse/discourse/security/advisories/GHSA-22v7-6wgj-g9f7 · Note
• https://github.com/discourse/discourse/releases/tag/v2026.6.0 · Note
• https://github.com/discourse/discourse/commit/4d46638041b5f3d1e1f7f6f6f19c1df3bd65a586 · Note
• https://github.com/discourse/discourse/releases/tag/v2026.5.1 · Note
• https://github.com/discourse/discourse/commit/6457ab71f36a2d1440fe96af0a2593897844b023 · Note
• https://github.com/discourse/discourse/commit/37969503f20369eb1712b7b88daedcfb4f63f5f1 · Note
• https://github.com/discourse/discourse/commit/7deb4b6963442569357b41e61febe37594e5e730 · Note
• https://github.com/discourse/discourse/releases/tag/v2026.1.5 · Note
• https://github.com/discourse/discourse/releases/tag/v2026.4.2 · Note