CVE-2026-32618
MEDIUMDiscourse: Unauthorized channel membership inference via excluded_memberships_channel_id
Title source: cnaDescription
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.
References (2)
Core 2
Core References
X_Refsource_Confirm x_refsource_confirm
https://github.com/discourse/discourse/security/advisories/GHSA-pc8p-w2m7-hgf3
X_Refsource_Misc x_refsource_misc
https://github.com/discourse/discourse/commit/81fd89e744058e509412158e5e6ac90c856ade64
Scores
CVSS v3
4.3
EPSS
0.0005
EPSS Percentile
14.8%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
partial
Details
CWE
CWE-200
Status
published
Products (5)
discourse/discourse
2026.3.0 (2 CPE variants)
discourse/discourse
2026.1.0 - 2026.1.3
discourse/discourse
>= 2026.1.0-latest, < 2026.1.3
discourse/discourse
>= 2026.2.0-latest, < 2026.2.2
discourse/discourse
>= 2026.3.0-latest, < 2026.3.0
Published
Mar 31, 2026
Tracked Since
Mar 31, 2026