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.

Metrics

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact Low

Integrity Impact None

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Exploitation none

Automatable yes

Technical Impact partial

Affected Vendors & Products

Vendors Products
Discourse Subscribe
Discourse Subscribe

No data.

No data.

OpenCVE Enrichment is a feature of OpenCVE that uses AI to automatically link vendors and products to CVEs. Learn more on GitHub.

Vendors Products
Discourse Subscribe
Discourse Subscribe
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://github.com/discourse/discourse/commit/0248e9ca82d0493037a9ca04d73904ccfad795f9 cve-icon cve-icon
https://github.com/discourse/discourse/commit/03444ddb74d535dda557350f4c5800a6ec2669d7 cve-icon cve-icon
https://github.com/discourse/discourse/commit/900f51c147913f667e64484c2f2dd48c723314ac cve-icon cve-icon
https://github.com/discourse/discourse/commit/da84c677213cac3b024e753f180f45472b89efde cve-icon cve-icon
https://github.com/discourse/discourse/pull/42091 cve-icon cve-icon
https://github.com/discourse/discourse/pull/42092 cve-icon cve-icon
https://github.com/discourse/discourse/pull/42093 cve-icon cve-icon
https://github.com/discourse/discourse/pull/42094 cve-icon cve-icon
https://github.com/discourse/discourse/security/advisories/GHSA-4p6q-h74v-5j7p cve-icon cve-icon
History

Tue, 11 Aug 2026 03:15:00 +0000

Type Values Removed Values Added
First Time appeared Discourse
Discourse discourse
Vendors & Products Discourse
Discourse discourse

Mon, 10 Aug 2026 21:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Mon, 10 Aug 2026 16:15:00 +0000

Type Values Removed Values Added
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.
Title Discourse: Anonymous sidebar serialization exposes descriptions of category-restricted tags
Weaknesses CWE-862
References
Metrics cvssV3_1

{'score': 5.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-08-10T21:11:02.865Z

Reserved: 2026-08-10T13:48:09.545Z

Link: CVE-2026-72723

cve-icon Vulnrichment

Updated: 2026-08-10T19:02:48.876Z

cve-icon NVD

Status : Received

Published: 2026-08-10T16:19:49.667

Modified: 2026-08-10T21:17:23.923

Link: CVE-2026-72723

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-11T03:00:04Z

Weaknesses