CVE-2026-27150 json
Discourse doesn't ensure guardian check when creating QueryGroupBookmark
published 2026-02-26 8 mo ago modified 2026-09-08 2 mo ago also BIT-discourse-2026-27150 , EUVD-2026-8889 , GHSA-rw95-54qr-qrw8
- 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 6%
- 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, missing `validate_before_create` authorization in Data Explorer's `QueryGroupBookmarkable` allows any logged-in user to create bookmarks for query groups they don't have access to, enabling metadata disclosure via bookmark reminder notifications. Versions 2025.12.2, 2026.1.1, and 2026.2.0 fix this issue and also make sure `validate_before_create` throws NotImplementedError in BaseBookmarkable if not implemented, to prevent similar issues in the future. 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
0.17% chance of exploitation in the next 30 days, higher than 6% 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-862 Missing Authorization
References
-
github.com
/discourse/discourse/security/advisories/GHSA-rw95-54qr-qrw8
vendor-advisory, advisory
-
nvd.nist.gov
/vuln/detail/CVE-2026-27150
web
Sources
- CVE List CVE-2026-27150
- NVD CVE-2026-27150
- OSV BIT-discourse-2026-27150
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.