SQL Injection Vulnerability in Discourse Open Source Discussion Platform
CVE-2026-27149

4.9MEDIUM

Key Information:

Vendor

Discourse
Status
Discourse
Vendor
CVE Published:
26 February 2026

What is CVE-2026-27149?

Discourse, an open-source discussion platform, has a vulnerability where SQL injection in the PM tag filtering system (list_private_messages_tag) could allow unauthorized users to bypass tag filter conditions. This could potentially lead to the exposure of sensitive private message metadata. Versions 2025.12.2, 2026.1.1, and 2026.2.0 have addressed this issue, and users are encouraged to upgrade to mitigate any associated risks. Currently, no known workarounds exist to secure the affected versions.

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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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