CVE-2026-44783 json
Discourse: Replying to a whisper lets non-whisperers create staff-only whisper posts
published 2026-06-12 4 mo ago modified 2026-09-08 2 mo ago also BIT-discourse-2026-44783 , EUVD-2026-36586 , GHSA-98ch-mgfj-wqpw
- cvss
- 5.4
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.1%
- EPSS 0.1% chance of exploitation in 30 days, percentile 3%
- public exploits
- 0
- none known
Summary
Discourse is an open-source discussion platform. From versions 2026.1.0-latest to before 2026.1.4, 2026.3.0-latest to before 2026.3.1, and 2026.4.0-latest to before 2026.4.1, a flaw in how replies to whisper posts are handled allows authenticated users outside the groups configured in whispers_allowed_groups to post into a topic's staff-only whisper channel. The injected content is visible to whisperers (typically staff) alongside legitimate whispers. Only sites that have whispers enabled are affected. This issue has been patched in versions 2026.1.4, 2026.3.1, 2026.4.1, and 2026.5.0-latest.1.
Patch / fix
- bitnami discourse 2026.1.4, 2026.3.1, 2026.4.1
- discourse discourse 2026.1.4, 2026.3.1, 2026.4.1
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 4 mo ago
Exploit prediction
0.15% chance of exploitation in the next 30 days, higher than 3% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 5.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N |
| OSV | 3.1 | 5.4 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| bitnami | discourse | >=2026.1.0, <2026.1.4 >=2026.3.0, <2026.3.1 >=2026.4.0, <2026.4.1 |
2026.1.4 2026.3.1 2026.4.1 |
Affected products
- discourse discourse
Classification
- Weakness
-
- CWE-284 Improper Access Control
References
-
github.com
/discourse/discourse/security/advisories/GHSA-98ch-mgfj-wqpw
third-party-advisory, advisory
-
nvd.nist.gov
/vuln/detail/CVE-2026-44783
web
Sources
- CVE List CVE-2026-44783
- NVD CVE-2026-44783
- OSV BIT-discourse-2026-44783
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.