Open Source Discussion Platform Vulnerability in Discourse
CVE-2026-27162

4.9MEDIUM

Key Information:

Vendor

Discourse
Status
Discourse
Vendor
CVE Published:
26 February 2026

What is CVE-2026-27162?

An access control vulnerability in the Discourse discussion platform allows unauthorized visibility of posts, including private whispers. Previous versions did not adequately validate user access before returning all posts. Users with insufficient permissions may inadvertently access sensitive information. The issue has been addressed in versions 2025.12.2, 2026.1.1, and 2026.2.0, with no available workarounds.

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Deploy the Patch

Affected Version(s)

discourse < 2025.12.2 < 2025.12.2

discourse >= 2026.1.0-latest, < 2026.1.1 < 2026.1.0-latest, 2026.1.1

discourse >= 2026.2.0-latest, < 2026.2.0 < 2026.2.0-latest, 2026.2.0

References

https://github.com/discourse/discourse/security/advisorie...
x_refsource_CONFIRM

CVSS V4

Score:
4.9
Severity:
MEDIUM
Confidentiality:
High
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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