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CVE-2026-72732— Discourse: Templates endpoint exposes hidden tag names

Quick assessment

Affected
discourse discourse
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Discourse是Discourse社区开源的一个集成人工智能技术的论坛社区平台。 Discourse 2026.1.6之前版本、2026.5.2之前版本、2026.6.1之前版本和2026.7.0之前版本存在授权问题漏洞，该漏洞源于discourse_templates端点未通过请求Guardian过滤标签，未遵循标签组权限，导致用户可查看未授权访问的隐藏标签名。

CVSS 4.3 · Medium EPSS 0.34% · P26

Affected Version Matrix 4

VendorProduct Version RangeStatus
discourse discourse < 2026.1.6 affected
>= 2026.5.0-latest, < 2026.5.2 affected
>= 2026.6.0-latest, < 2026.6.1 affected
>= 2026.7.0-latest, < 2026.7.0 affected
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I. Basic Information for CVE-2026-72732

Vulnerability Information
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Vulnerability Title
Discourse: Templates endpoint exposes hidden tag names
Source: CVE Program / CVE List V5
Vulnerability Description
Discourse is an open-source discussion platform. Prior to 2026.1.6, 2026.5.2, 2026.6.1, and 2026.7.0, the discourse_templates endpoint exposed hidden tag names because DiscourseTemplates::TemplatesSerializer in plugins/discourse-templates/app/serializers/discourse_templates/templates_serializer.rb did not filter tags through the request Guardian. The serializer did not respect tag group permissions, allowing users to see tags they were not permitted to view. This issue is fixed in versions 2026.1.6, 2026.5.2, 2026.6.1, and 2026.7.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制缺失
Source: CVE Program / CVE List V5
Vulnerability Title
Discourse 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Discourse是Discourse社区开源的一个集成人工智能技术的论坛社区平台。 Discourse 2026.1.6之前版本、2026.5.2之前版本、2026.6.1之前版本和2026.7.0之前版本存在授权问题漏洞，该漏洞源于discourse_templates端点未通过请求Guardian过滤标签，未遵循标签组权限，导致用户可查看未授权访问的隐藏标签名。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
discourse discourse < 2026.1.6 -

II. Public POCs for CVE-2026-72732

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III. Intelligence Information for CVE-2026-72732

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Patches & Fixes for CVE-2026-72732 (4)

Vendor Advisories for CVE-2026-72732 (1)

Same Patch Batch · discourse · 2026-08-10 · 13 CVEs total

CVE-2026-72730 8.7 HIGH Discourse: Stored XSS chat-transcript username unescaped in Rich Text Editor
CVE-2026-72731 7.1 HIGH Discourse: Strip SQL comments and use non-recursive parameter interpolation in Data Explor
CVE-2026-72726 6.5 MEDIUM Discourse: Unauthorized eavesdropping on private AI bot conversations.
CVE-2026-72720 6.4 MEDIUM Discourse: HTML injection in PrettyText.format_for_email from cooked-attribute reparsing
CVE-2026-72728 6.3 MEDIUM Discourse: Onebox iframe origin allowlist enforces URL authority boundary
CVE-2026-72725 5.4 MEDIUM Discourse: Stored XSS in staff action logs injects staff UI
CVE-2026-72721 5.3 MEDIUM Discourse: Onebox Domain Blocklist Bypass via Case-Sensitive Comparison
CVE-2026-72723 5.3 MEDIUM Discourse: Anonymous sidebar serialization exposes descriptions of category-restricted tag
CVE-2026-72727 4.8 MEDIUM Discourse: Stored XSS in the moderation review queue
CVE-2026-72722 4.3 MEDIUM Discourse: Duplicate lookup reveals restricted topic titles through canonicalized URLs
CVE-2026-72724 4.3 MEDIUM Discourse: Private Chat Threat Message Disclosure via Chat Onebox Channel/Threat ID Mismat
CVE-2026-72729 2.0 LOW Discourse: Stored XSS in discourse-local-dates plugin

IV. Related Vulnerabilities

Same product: discourse
Same vendor: discourse
Same weakness: CWE-862

V. Comments for CVE-2026-72732

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