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CVE-2026-53960— Discourse: Hidden first-post excerpt is emitted in Q&A schema JSON-LD

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，该漏洞源于隐藏或不可查看的首帖内容被泄露在公开的Q&A（QAPage）JSON-LD结构化数据中，可能导致信息暴露给未经验证的访问者和搜索引擎爬虫。

CVSS 5.3 · Medium EPSS 0.19% · P10

Possible ATT&CK Techniques 1 AI

T1530 · Data from Cloud Storage

Affected Version Matrix 3

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
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I. Basic Information for CVE-2026-53960

Vulnerability Information
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Vulnerability Title
Discourse: Hidden first-post excerpt is emitted in Q&A schema JSON-LD
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, hidden or otherwise unviewable first-post content was leaked as an excerpt in the publicly-served Q&A (QAPage) JSON-LD structured data, exposing it to any unauthenticated visitor and to search-engine crawlers. 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:N/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，该漏洞源于隐藏或不可查看的首帖内容被泄露在公开的Q&A（QAPage）JSON-LD结构化数据中，可能导致信息暴露给未经验证的访问者和搜索引擎爬虫。
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-2026-53960

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III. Intelligence Information for CVE-2026-53960

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Vendor Advisories for CVE-2026-53960 (1)

Same Patch Batch · discourse · 2026-08-17 · 4 CVEs total

CVE-2026-55674 9.3 CRITICAL Discourse: Cache poisoning/XSS via color scheme cookies
CVE-2026-59829 4.3 MEDIUM Discourse: Review queue exposes flag-related private message excerpts to category group mo
CVE-2026-55704 4.3 MEDIUM Discourse: Shared-draft titles and excerpts leak through group post serialization

IV. Related Vulnerabilities

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

V. Comments for CVE-2026-53960

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