BIT-discourse-2026-91156

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Import Source
https://github.com/bitnami/vulndb/tree/main/data/discourse/BIT-discourse-2026-91156.json
JSON Data
https://api.osv.dev/v1/vulns/BIT-discourse-2026-91156
Aliases
Published
2026-10-21T08:47:52Z
Modified
2026-10-21T12:11:07Z
Summary
Discourse: Chat MessageBus delivers read-restricted messages to unauthorized users
Details

Discourse is an open-source discussion platform. Prior to 2026.9.0, 2026.8.1, 2026.7.3, and 2026.1.9, MessageBus audience calculation could deliver messages from a read-restricted category chat channel to an authenticated user who could view the category but was not allowed to use Chat under the site's group restrictions. The publication path bounded events by category visibility without also enforcing Chat eligibility, exposing live and recent message content available in the MessageBus backlog. The issue does not permit retrieval of the channel's full history through the Chat API and does not permit message creation or modification. This issue is fixed in versions 2026.9.0, 2026.8.1, 2026.7.3, and 2026.1.9.

Database specific 
{
    "cpes":  [
        "cpe:2.3:a:discourse:discourse:*:*:*:*:stable:*:*:*",
        "cpe:2.3:a:discourse:discourse:*:*:*:*:beta:*:*:*"
    ],
    "severity":  "High"
}
References

Affected packages

Bitnami / discourse

Package

Name
discourse
Purl
pkg:bitnami/discourse

Severity

  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N CVSS Calculator

Affected ranges

Type
SEMVER
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
2026.1.9
Introduced
2026.7.0
Fixed
2026.7.3
Introduced
2026.8.0
Fixed
2026.8.1
Introduced
2026.8.99
Fixed
2026.9.0

Database specific

source 
"https://github.com/bitnami/vulndb/tree/main/data/discourse/BIT-discourse-2026-91156.json"