{"id":"BIT-discourse-2026-72723","summary":"Discourse: Anonymous sidebar serialization exposes descriptions of category-restricted tags","details":"Discourse is an open-source discussion platform. Prior to 2026.1.6, 2026.5.2, 2026.6.1, and 2026.7.0, SiteSerializer.anonymous_default_navigation_menu_tags serializes tags from SiteSetting.default_navigation_menu_tags without applying DiscourseTagging.filter_visible for the anonymous viewer. An unauthenticated user can retrieve restricted tag names and descriptions through /site.json when those tags are limited by inaccessible categories, category tag groups, or tag-group permissions. This issue is fixed in versions 2026.1.6, 2026.5.2, 2026.6.1, and 2026.7.0.","aliases":["CVE-2026-72723","GHSA-4p6q-h74v-5j7p"],"modified":"2026-08-17T08:10:54.610975194Z","published":"2026-08-17T05:44:24.499Z","database_specific":{"cpes":["cpe:2.3:a:discourse:discourse:*:*:*:*:*:*:*:*"],"severity":"Medium"},"references":[{"type":"WEB","url":"https://github.com/discourse/discourse/commit/0248e9ca82d0493037a9ca04d73904ccfad795f9"},{"type":"WEB","url":"https://github.com/discourse/discourse/commit/03444ddb74d535dda557350f4c5800a6ec2669d7"},{"type":"WEB","url":"https://github.com/discourse/discourse/commit/900f51c147913f667e64484c2f2dd48c723314ac"},{"type":"WEB","url":"https://github.com/discourse/discourse/commit/da84c677213cac3b024e753f180f45472b89efde"},{"type":"WEB","url":"https://github.com/discourse/discourse/pull/42091"},{"type":"WEB","url":"https://github.com/discourse/discourse/pull/42092"},{"type":"WEB","url":"https://github.com/discourse/discourse/pull/42093"},{"type":"WEB","url":"https://github.com/discourse/discourse/pull/42094"},{"type":"WEB","url":"https://github.com/discourse/discourse/security/advisories/GHSA-4p6q-h74v-5j7p"},{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-72723"}],"affected":[{"package":{"name":"discourse","ecosystem":"Bitnami","purl":"pkg:bitnami/discourse"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"2026.1.6"},{"introduced":"2026.5.0"},{"fixed":"2026.5.2"},{"introduced":"2026.6.0"},{"fixed":"2026.6.1"}]}],"database_specific":{"source":"https://github.com/bitnami/vulndb/tree/main/data/discourse/BIT-discourse-2026-72723.json"},"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N"}]}],"schema_version":"1.9.0"}