CVE-2026-44786
HIGHDiscourse: Public chat MessageBus broadcasts are not restricted to chat-eligible users
Title source: cnaDescription
Discourse is an open-source discussion platform. From versions 2026.1.0-latest to before 2026.1.4, 2026.3.0-latest to before 2026.3.1, and 2026.4.0-latest to before 2026.4.1, chat events for public category channels are published to MessageBus without permission scoping, so any MessageBus subscriber without chat enabled could receive chat message payloads in real time. This issue has been patched in versions 2026.1.4, 2026.3.1, 2026.4.1, and 2026.5.0-latest.1.
References (1)
Core 1
Core References
X_Refsource_Confirm x_refsource_confirm
https://github.com/discourse/discourse/security/advisories/GHSA-j7wq-rf5c-8783
Scores
CVSS v3
7.5
EPSS
0.0024
EPSS Percentile
15.4%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
yes
Technical Impact
partial
Details
CWE
CWE-200
Status
published
Products (3)
discourse/discourse
>= 2026.1.0-latest, < 2026.1.4
discourse/discourse
>= 2026.3.0-latest, < 2026.3.1
discourse/discourse
>= 2026.4.0-latest, < 2026.4.1
Published
Jun 12, 2026
Tracked Since
Jun 13, 2026