CVE-2026-72723Discourse: Anonymous sidebar serialization exposes descriptions of category-restricted tags
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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.
- CVSS
- 5.3 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
- Weakness (CWE)
- CWE-862
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- GitHub_M
- NVD analysis
- Deferred
- Record last updated
- Aug 10, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
discourse discourse discourse:discourse (from the name) | before 2026.1.6; from 2026.5.0-latest, < 2026.5.2; from 2026.6.0-latest, < 2026.6.1; from 2026.7.0-latest, < 2026.7.0 | CNA record |
References
- https://github.com/discourse/discourse/security/advisories/GHSA-4p6q-h74v-5j7px-refsource-confirm
- https://github.com/discourse/discourse/pull/42091x-refsource-misc
- https://github.com/discourse/discourse/pull/42092x-refsource-misc
- https://github.com/discourse/discourse/pull/42093x-refsource-misc
- https://github.com/discourse/discourse/pull/42094x-refsource-misc
- https://github.com/discourse/discourse/commit/0248e9ca82d0493037a9ca04d73904ccfad795f9x-refsource-misc
- https://github.com/discourse/discourse/commit/03444ddb74d535dda557350f4c5800a6ec2669d7x-refsource-misc
- https://github.com/discourse/discourse/commit/900f51c147913f667e64484c2f2dd48c723314acx-refsource-misc
- https://github.com/discourse/discourse/commit/da84c677213cac3b024e753f180f45472b89efdex-refsource-misc
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.