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VULNERABILITIES

CVE-2026-32243 Details

Description

Discourse is an open-source discussion platform. From versions 2026.1.0-latest to before 2026.1.3, 2026.2.0-latest to before 2026.2.2, and 2026.3.0-latest to before 2026.3.0, an attacker with the ability to create shared AI conversations could inject arbitrary HTML and JavaScript via crafted conversation titles. This payload would execute in the browser of any user viewing the onebox preview, potentially allowing session hijacking or unauthorized actions on behalf of the victim. This issue has been patched in versions 2026.1.3, 2026.2.2, and 2026.3.0.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:5.4 MEDIUMVector:CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
CNA: CISA-ADPCVSS-B:6.1 MEDIUMVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://github.com/discourse/discourse/commit/cac7d618a562ce934f8dbf73cdb70066a4806b4c [email protected]Patch
https://github.com/discourse/discourse/security/advisories/GHSA-pjc5-8x3w-rfwx [email protected]Vendor Advisory

Weakness Enumeration

CWE-IDCWE NameSource
CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')[email protected]

Affected Products

ProductVersions
discourse discourse
>= 2026.1.0, < 2026.1.3
>= 2026.2.0, < 2026.2.2
2026.3.0

CPE

  • cpe:2.3:a:discourse:discourse:*:*:*:*:latest:*:*:*
  • cpe:2.3:a:discourse:discourse:2026.3.0:*:*:*:latest:*:*:*
  • cpe:2.3:a:discourse:discourse:2026.3.0:*:*:*:latest.1:*:*:*

Remediation

  • No remediation found in references.

Change History

6 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-32243
NVD Published Date:
Mar 31, 2026
NVD Last Modified:
Jul 24, 2026
Source:
[email protected]
CVE-2026-32243 Details - Not Deferred