CVE-2026-27152

DIscourse has DM communication-preference bypass when adding members

State: Published
Severity: 1.3 Low
Published: Feb 26, 2026
Updated: Mar 3, 2026
Reserved: Feb 18, 2026

Description

Discourse is an open source discussion platform. Prior to versions 2025.12.2, 2026.1.1, and 2026.2.0, DM communication-preference bypass when adding members via `Chat::AddUsersToChannel` — a user could add targets who have blocked/ignored/muted them to an existing DM channel, bypassing per-recipient PM restrictions that are enforced during DM channel creation. Versions 2025.12.2, 2026.1.1, and 2026.2.0 patch the issue. No known workarounds are available.

Scores

CVSS	Score	Vector	Source
4.0	1.3 Low	CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U	GitHub_M

Weaknesses

CWE-284 Improper Access Control

Affected Products

Product	Versions
discoursediscourse	< 2025.12.2Affected >= 2026.1.0-latest, < 2026.1.1Affected >= 2026.2.0-latest, < 2026.2.0Affected

References

https://github.com/discourse/discourse/security/advisories/GHSA-f8ff-pxg3-7967

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