CVE-2026-33355
Last modified
CVE-2026-33355 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. Discourse is an open-source discussion platform. Prior to versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2, the `/private-posts` endpoint did not apply post-type visibility filtering, allowing regular PM participants to see whisper posts in PM topics they had access to. EPSS estimates a 0.41% chance of exploitation in the next 30 days.
Description
Discourse is an open-source discussion platform. Prior to versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2, the `/private-posts` endpoint did not apply post-type visibility filtering, allowing regular PM participants to see whisper posts in PM topics they had access to. Versions 2026.3.0-latest.1, 2026.2.1, and 2026.1.2 contain a patch. No known workarounds are available.
Metrics
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
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-2026-33355?
How severe is CVE-2026-33355?
How do I fix CVE-2026-33355?
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- 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-2026-3335The Canto plugin for WordPress is vulnerable to Missing Auth…5.3
- CVE-2026-33350LORIS (Longitudinal Online Research and Imaging System) is a…7.5
- CVE-2026-33351WWBN AVideo is an open source video platform. Prior to versi…9.1
- CVE-2026-33352WWBN AVideo is an open source video platform. Prior to versi…9.8
- CVE-2026-33353Soft Serve is a self-hostable Git server for the command lin…6.5
- CVE-2026-33354WWBN AVideo is an open source video platform. In versions up…6.5
- CVE-2026-33356In Meari IoT Cloud MQTT Broker deployments running EMQX 4.x,…7.7
- CVE-2026-33357In Meari client applications embedding "com.meari.sdk" (incl…7.5
- CVE-2026-33359In Meari IoT Cloud alert image storage on Alibaba OSS (lates…7.5
- CVE-2026-3336Improper certificate validation in PKCS7_verify() in AWS-LC …8.7
- CVE-2026-33361In Meari IoT SDK image handling (libmrplayer.so) as observed…7.5
- CVE-2026-33362In Meari IoT SDK builds embedded in CloudEdge 5.5.0 (build 2…8.6
Are you affected by CVE-2026-33355?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST