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.

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact Low

Integrity Impact None

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
discourse discourse affected
Version Status Constraints
>= 2026.1.0-latest, < 2026.1.5 affected —
>= 2026.4.0-latest, < 2026.4.2 affected —
>= 2026.5.0-latest, < 2026.5.1 affected —

No data.

No data.

OpenCVE Enrichment is a feature of OpenCVE that uses AI to automatically link vendors and products to CVEs. Learn more on GitHub.

Vendors Products
Discourse Subscribe
Discourse Subscribe

Project Subscriptions

Vendors Products
Discourse Subscribe
Discourse Subscribe
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://github.com/discourse/discourse/commit/37969503f20369eb1712b7b88daedcfb4f63f5f1 cve-icon
https://github.com/discourse/discourse/commit/4d46638041b5f3d1e1f7f6f6f19c1df3bd65a586 cve-icon
https://github.com/discourse/discourse/commit/6457ab71f36a2d1440fe96af0a2593897844b023 cve-icon
https://github.com/discourse/discourse/commit/7deb4b6963442569357b41e61febe37594e5e730 cve-icon
https://github.com/discourse/discourse/releases/tag/v2026.1.5 cve-icon
https://github.com/discourse/discourse/releases/tag/v2026.4.2 cve-icon
https://github.com/discourse/discourse/releases/tag/v2026.5.1 cve-icon
https://github.com/discourse/discourse/releases/tag/v2026.6.0 cve-icon
https://github.com/discourse/discourse/security/advisories/GHSA-22v7-6wgj-g9f7 cve-icon
History

Thu, 09 Jul 2026 23:45:00 +0000

Type Values Removed Values Added
First Time appeared Discourse
Discourse discourse
Vendors & Products Discourse
Discourse discourse

Thu, 09 Jul 2026 22:15:00 +0000

Type Values Removed Values Added
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.
Title Discourse: Private event sample invitees are serialized to non-invited event viewers
Weaknesses CWE-200
References
Metrics cvssV3_1

{'score': 5.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-07-09T22:08:52.125Z

Reserved: 2026-05-13T07:45:21.252Z

Link: CVE-2026-45780

cve-icon Vulnrichment

No data.

cve-icon NVD

No data.

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-07-09T23:30:16Z

Weaknesses