CVE-2026-28282
Last modified
CVE-2026-28282 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. Discourse is an open-source discussion platform. Versions prior to 2026.3.0-latest.1, 2026.2.1, and 2026.1.2 have a security flaw in the discourse-policy plugin which allowed a user with policy creation permission to gain membership access to any private/restricted groups. EPSS estimates a 0.33% chance of exploitation in the next 30 days.
Description
Discourse is an open-source discussion platform. Versions prior to 2026.3.0-latest.1, 2026.2.1, and 2026.1.2 have a security flaw in the discourse-policy plugin which allowed a user with policy creation permission to gain membership access to any private/restricted groups. Once membership to a private/restricted group has been obtained, the user will be able to read private topics that only the group has access to. Versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2 contain a patch. As a workaround, review all policies for the use of `add-users-to-group` and temporarily remove the attribute from the policy. Alternatively, disable the discourse-policy plugin by disabling the `policy_enabled` site setting.
Metrics
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/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
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Discourse | Discourse | >= 2026.1.0, < 2026.1.2 |
| Discourse | Discourse | >= 2026.2.0, < 2026.2.1 |
| Discourse | Discourse | 2026.3.0 |
References
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
What is CVE-2026-28282?
How severe is CVE-2026-28282?
How do I fix CVE-2026-28282?
How Strix Helps
- Uncovering a hidden BOLA in Appsmith's snapshot logicStrix autonomously discovered a BOLA/IDOR vulnerability in Appsmith's snapshot deletion path.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2026
- CVE-2026-28276Initiative is a self-hosted project management platform. An …7.5
- CVE-2026-28277LangGraph SQLite Checkpoint is an implementation of LangGrap…7.2
- CVE-2026-28279osctrl is an osquery management solution. Prior to version 0…8.4
- CVE-2026-2828Rejected reason: ** REJECT ** DO NOT USE THIS CANDIDATE NUMB…
- CVE-2026-28280osctrl is an osquery management solution. Prior to version 0…8.7
- CVE-2026-28281InstantCMS is a free and open source content management syst…7.1
- CVE-2026-28284FreePBX is an open source IP PBX. Prior to versions 16.0.10 …8.8
- CVE-2026-28286ZimaOS is a fork of CasaOS, an operating system for Zima dev…9.9
- CVE-2026-28287FreePBX is an open source IP PBX. From versions 16.0.17.2 to…8.8
- CVE-2026-28288Dify is an open-source LLM app development platform. Prior t…5.3
- CVE-2026-28289FreeScout is a free help desk and shared inbox built with PH…8.1
- CVE-2026-28291simple-git enables running native Git commands from JavaScri…8.1
Are you affected by CVE-2026-28282?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST