{"id":"CVE-2026-45780","summary":"Discourse: Private event sample invitees are serialized to non-invited event viewers","details":"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.","aliases":["BIT-discourse-2026-45780","GHSA-22v7-6wgj-g9f7"],"modified":"2026-11-11T02:48:59.744611342Z","published":"2026-07-09T22:08:52.125Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/45xxx/CVE-2026-45780.json","cna_assigner":"GitHub_M","cwe_ids":["CWE-200"]},"references":[{"type":"WEB","url":"https://github.com/discourse/discourse/releases/tag/v2026.1.5"},{"type":"WEB","url":"https://github.com/discourse/discourse/releases/tag/v2026.4.2"},{"type":"WEB","url":"https://github.com/discourse/discourse/releases/tag/v2026.5.1"},{"type":"WEB","url":"https://github.com/discourse/discourse/releases/tag/v2026.6.0"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/45xxx/CVE-2026-45780.json"},{"type":"ADVISORY","url":"https://github.com/discourse/discourse/security/advisories/GHSA-22v7-6wgj-g9f7"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-45780"},{"type":"FIX","url":"https://github.com/discourse/discourse/commit/37969503f20369eb1712b7b88daedcfb4f63f5f1"},{"type":"FIX","url":"https://github.com/discourse/discourse/commit/4d46638041b5f3d1e1f7f6f6f19c1df3bd65a586"},{"type":"FIX","url":"https://github.com/discourse/discourse/commit/6457ab71f36a2d1440fe96af0a2593897844b023"},{"type":"FIX","url":"https://github.com/discourse/discourse/commit/7deb4b6963442569357b41e61febe37594e5e730"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/discourse/discourse","events":[{"introduced":"322d3c0ac6a8f133b3f82875e9dbbe310f638c1b"},{"fixed":"c06899647d758493d95a5b301e573ffa3db1e878"},{"introduced":"fdd750d960e603415db62242eca3c30d68e366db"},{"fixed":"4bbdddfc6700ca23604242111d4fa0e00347af97"},{"introduced":"640840d818f4ee9375829ece0ef452923bb0c012"},{"fixed":"598586ccf2e046a25d4b54132e4e1feb47f24e98"},{"introduced":"06d03da34c4ed09ea59f917f045ba250d2b6320d"},{"fixed":"37969503f20369eb1712b7b88daedcfb4f63f5f1"},{"fixed":"4d46638041b5f3d1e1f7f6f6f19c1df3bd65a586"},{"fixed":"6457ab71f36a2d1440fe96af0a2593897844b023"},{"fixed":"7deb4b6963442569357b41e61febe37594e5e730"},{"fixed":"06d03da34c4ed09ea59f917f045ba250d2b6320d"}],"database_specific":{"extracted_events":[{"source":"CPE_RANGE","cpe":"cpe:2.3:a:discourse:discourse:*:*:*:*:*:*:*:*","range":[{"introduced":"2026.1.0"},{"fixed":"2026.1.5"}]},{"source":"CPE_RANGE","cpe":"cpe:2.3:a:discourse:discourse:*:*:*:*:*:*:*:*","range":[{"introduced":"2026.4.0"},{"fixed":"2026.4.2"}]},{"range":[{"introduced":"2026.5.0"},{"fixed":"2026.5.1"}],"source":"CPE_RANGE","cpe":"cpe:2.3:a:discourse:discourse:*:*:*:*:*:*:*:*"},{"range":[{"introduced":"2026.6.0"},{"last_affected":"2026.6.0"}],"source":"CPE_STRING","cpe":"cpe:2.3:a:discourse:discourse:2026.6.0:*:*:*:latest:*:*:*"},{"range":[{"fixed":"37969503f20369eb1712b7b88daedcfb4f63f5f1"}],"source":"REFERENCES_COMMIT"},{"range":[{"fixed":"4d46638041b5f3d1e1f7f6f6f19c1df3bd65a586"}],"source":"REFERENCES_COMMIT"},{"source":"REFERENCES_COMMIT","range":[{"fixed":"6457ab71f36a2d1440fe96af0a2593897844b023"}]},{"source":"REFERENCES_COMMIT","range":[{"fixed":"7deb4b6963442569357b41e61febe37594e5e730"}]},{"range":[{"fixed":"c06899647d758493d95a5b301e573ffa3db1e878"}],"source":"REFERENCES_TAG","original_tag":"v2026.1.5"},{"range":[{"fixed":"4bbdddfc6700ca23604242111d4fa0e00347af97"}],"source":"REFERENCES_TAG","original_tag":"v2026.4.2"},{"range":[{"fixed":"598586ccf2e046a25d4b54132e4e1feb47f24e98"}],"source":"REFERENCES_TAG","original_tag":"v2026.5.1"},{"source":"REFERENCES_TAG","original_tag":"v2026.6.0","range":[{"fixed":"06d03da34c4ed09ea59f917f045ba250d2b6320d"}]}]}}],"versions":["2026.6.0","v2026.5.0","v2026.1.4","v2026.4.1","v2026.5.0-latest.1","v2026.4.0","v2026.5.0-latest","v2026.1.3","v2026.4.0-latest","v2026.1.2","v2026.1.1","v2026.1.0","v2026.1.0-latest"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-45780.json"}}],"schema_version":"1.9.2","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N"}]}