Discourse: Anonymous sidebar serialization exposes descriptions of category-restricted tags
Published Aug 10, 2026 · Updated Oct 23, 2026 · Also known as GHSA-4p6q-h74v-5j7p, BIT-discourse-2026-72723
Original summary
Normalized public record · Updated Oct 23, 2026
Discourse: Anonymous sidebar serialization exposes descriptions of category-restricted tags
Publisher and source text is retained separately from QFinch interpretation.
QFinch assessment
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.
Evidence: public source recordsAffected products
| Affected package, product or range | Fix status |
|---|---|
| Consult the referenced vendor advisory for affected versions. | Consult source advisory |
Matching a version is only one part of assessing exposure. QFinch has not assessed your environment on this public page.
Remediation
Apply the vendor-supported fixed release or mitigation, then verify the affected component is no longer reachable.
- Confirm the affected product and reachable code path exist in your environment.
- Apply the vendor-supported patch or mitigation from the primary advisory.
- Rescan the exact deployed revision and retain verification evidence.
Evidence coverage
- SSVC priority
- LOW
- Confidence
- Not available
- Aliases
- GHSA-4p6q-h74v-5j7p, BIT-discourse-2026-72723
Scores appear only when corresponding evidence exists. Missing data is never interpreted as zero risk.
Sources and record history
- Security advisory ↗
- Source repository ↗
- Source repository ↗
- Source repository ↗
- Source repository ↗
- Patch commit ↗
- Patch commit ↗
- Patch commit ↗
- Patch commit ↗
Record history
Published Aug 10, 2026 · Last refreshed Oct 23, 2026