CVE-2026-27152CWE-284

DIscourse has DM communication-preference bypass when adding members

Low · published February 26, 2026

CVSS v4.0
1.3
EPSS
0%
Percentile
18.7
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
1.3 · LOW
Vector
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
EPSS
0.00274 · 18.7th percentile
Weakness
CWE-284 · Improper Access Control
Published
2026-02-26T20:00Z
EPSS history
Timeline
  • 26 FEB 20:00Z
    DIscourse has DM communication-preference bypass when adding members
    cvelistv5