CVE-2026-33394
Received Received - Intake
Information Disclosure in Discourse Post Edits Admin Report

Publication date: 2026-03-19

Last updated on: 2026-03-24

Assigner: GitHub, Inc.

Description
Discourse is an open-source discussion platform. Prior to versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2, the Post Edits admin report (/admin/reports/post_edits) leaked the first 40 characters of raw post content from private messages and secure categories to moderators who shouldn't have access. Versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2 contain a patch. No known workarounds are available.
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Meta Information
Published
2026-03-19
Last Modified
2026-03-24
Generated
2026-06-16
AI Q&A
2026-03-20
EPSS Evaluated
2026-06-15
NVD
CVE-2026-33394
Affected Vendors & Products
Showing 3 associated CPEs
Vendor Product Version / Range
discourse discourse From 2026.1.0 (inc) to 2026.1.2 (exc)
discourse discourse From 2026.2.0 (inc) to 2026.2.1 (exc)
discourse discourse 2026.3.0
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-200 The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.
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Executive Summary

This vulnerability exists in the Discourse open-source discussion platform prior to versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2. The issue is that the Post Edits admin report (/admin/reports/post_edits) leaked the first 40 characters of raw post content from private messages and secure categories to moderators who should not have had access to this information.

The vulnerability was patched in the specified versions, and no known workarounds are available.

Impact Analysis

This vulnerability can lead to unauthorized disclosure of sensitive information because moderators without proper permissions could see partial content (first 40 characters) of private messages and posts in secure categories.

Although the impact is limited to a small portion of the message content, it still represents a confidentiality breach which could expose sensitive or private information.

The CVSS base score of 2.7 indicates a low severity impact, with confidentiality impact but no impact on integrity or availability.

Mitigation Strategies

To mitigate this vulnerability, you should upgrade your Discourse installation to one of the patched versions: 2026.3.0-latest.1, 2026.2.1, or 2026.1.2.

No known workarounds are available, so applying the patch by upgrading is the immediate recommended action.

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