Access Control Flaw in Discourse's Subscription Plugin Affects Open-Source Platform
CVE-2026-34154

2.1LOW

Key Information:

Vendor

Discourse
Status
Discourse
Vendor
CVE Published:
19 May 2026

What is CVE-2026-34154?

A vulnerability in the subscriptions plugin of Discourse enables users to access subscription-gated groups without the requisite payment, compromising the intended subscription model. This defect exists in versions of Discourse preceding 2026.1.4, 2026.3.1, 2026.4.1, and 2026.5.0-latest.1, but has been remedied in subsequent updates.

Affected Version(s)

discourse < 2026.1.4 < 2026.1.4

discourse >= 2026.3.0-latest, < 2026.3.1 < 2026.3.0-latest, 2026.3.1

discourse >= 2026.4.0-latest, < 2026.4.1 < 2026.4.0-latest, 2026.4.1

References

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

CVSS V4

Score:
2.1
Severity:
LOW
Confidentiality:
Low
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
High
Attack Required:
Physical
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.