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CVE-2026-45780
Discourse: Private event sample invitees are serialized to non-invited event viewers
Medium5.3EPSS 0.50%
- Published
- Updated
- Reserved
- Assigned by
- GitHub_M
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.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| GitHub_MCNA (assigner) | 3.1 | Medium5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N |
| NVDNVD · Analyzed | 3.1 | Medium4.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N |
- EPSS (exploitation in 30 days)
- 0.50% · top 57% of all CVEs (6 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: yes · Technical impact: partial
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.3.
Weakness
Affected products
References (9)
- https://github.com/discourse/discourse/security/advisories/GHSA-22v7-6wgj-g9f7 (opens in a new tab)x_refsource_CONFIRM
- https://github.com/discourse/discourse/commit/37969503f20369eb1712b7b88daedcfb4f63f5f1 (opens in a new tab)x_refsource_MISC
- https://github.com/discourse/discourse/commit/4d46638041b5f3d1e1f7f6f6f19c1df3bd65a586 (opens in a new tab)x_refsource_MISC
- https://github.com/discourse/discourse/commit/6457ab71f36a2d1440fe96af0a2593897844b023 (opens in a new tab)x_refsource_MISC
- https://github.com/discourse/discourse/commit/7deb4b6963442569357b41e61febe37594e5e730 (opens in a new tab)x_refsource_MISC
- https://github.com/discourse/discourse/releases/tag/v2026.1.5 (opens in a new tab)x_refsource_MISC
- https://github.com/discourse/discourse/releases/tag/v2026.4.2 (opens in a new tab)x_refsource_MISC
- https://github.com/discourse/discourse/releases/tag/v2026.5.1 (opens in a new tab)x_refsource_MISC
- https://github.com/discourse/discourse/releases/tag/v2026.6.0 (opens in a new tab)x_refsource_MISC
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2026-45780)Record last updated .