CVE-2026-27152 json
DIscourse has DM communication-preference bypass when adding members
published 2026-02-26 8 mo ago modified 2026-09-08 2 mo ago also BIT-discourse-2026-27152 , EUVD-2026-8891 , GHSA-f8ff-pxg3-7967
- cvss
- 3.8
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 7%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- bitnami discourse 2025.12.2, 2026.1.1
- discourse discourse 2025.12.2, 2026.1.1, 2026.2.0
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 8 mo ago
Exploit prediction
0.18% chance of exploitation in the next 30 days, higher than 7% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 1.3 | 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 |
| CNA | 4.0 | 1.3 | 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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
| NVD | 3.1 | 3.8 | CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| bitnami | discourse | <2025.12.2 >=2026.1.0, <2026.1.1 |
2025.12.2 2026.1.1 |
Affected products
- discourse discourse
Classification
- Weakness
-
- CWE-284 Improper Access Control
References
-
github.com
/discourse/discourse/security/advisories/GHSA-f8ff-pxg3-7967
vendor-advisory, advisory
-
nvd.nist.gov
/vuln/detail/CVE-2026-27152
web
Sources
- CVE List CVE-2026-27152
- NVD CVE-2026-27152
- OSV BIT-discourse-2026-27152
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.