EUVD-2026-17555

| CVE-2026-32618 MEDIUM
2026-03-31 GitHub_M
4.3
CVSS 3.1
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CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None

Lifecycle Timeline

3
EUVD ID Assigned
Mar 31, 2026 - 18:16 euvd
EUVD-2026-17555
Analysis Generated
Mar 31, 2026 - 18:16 vuln.today
CVE Published
Mar 31, 2026 - 17:40 nvd
MEDIUM 4.3

Tags

Information Disclosure

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, there is possible channel membership inference from chat user search without authorization. This issue has been patched in versions 2026.1.3, 2026.2.2, and 2026.3.0.

Analysis

Discourse chat user search functionality discloses channel membership information to authenticated users without proper authorization checks, allowing users to infer private channel membership across versions 2026.1.0-2026.1.2, 2026.2.0-2026.2.1, and 2026.3.0-rc1, affecting community administrators and organizations relying on channel privacy. The vulnerability requires authenticated access but carries low confidentiality impact (CVSS 4.3); patches are available in versions 2026.1.3, 2026.2.2, and 2026.3.0.

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Priority Score

22
Low Medium High Critical
KEV: 0
EPSS: +0.0
CVSS: +22
POC: 0

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EUVD-2026-17555 vulnerability details – vuln.today
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