CVE-2026-72723
Discourse: Anonymous sidebar serialization exposes descriptions of category-restricted tags
- Published
- Updated
- Reserved
- Assigned by
- GitHub_M
Description
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.
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 · Deferred | 3.1 | Medium5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N |
- EPSS (exploitation in 30 days)
- 0.53% · top 55% of all CVEs (7 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: yes · Technical impact: partial
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-4p6q-h74v-5j7p (opens in a new tab)x_refsource_CONFIRM
- https://github.com/discourse/discourse/pull/42091 (opens in a new tab)x_refsource_MISC
- https://github.com/discourse/discourse/pull/42092 (opens in a new tab)x_refsource_MISC
- https://github.com/discourse/discourse/pull/42093 (opens in a new tab)x_refsource_MISC
- https://github.com/discourse/discourse/pull/42094 (opens in a new tab)x_refsource_MISC
- https://github.com/discourse/discourse/commit/0248e9ca82d0493037a9ca04d73904ccfad795f9 (opens in a new tab)x_refsource_MISC
- https://github.com/discourse/discourse/commit/03444ddb74d535dda557350f4c5800a6ec2669d7 (opens in a new tab)x_refsource_MISC
- https://github.com/discourse/discourse/commit/900f51c147913f667e64484c2f2dd48c723314ac (opens in a new tab)x_refsource_MISC
- https://github.com/discourse/discourse/commit/da84c677213cac3b024e753f180f45472b89efde (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-2026-72723)Record last updated .