Data Export Vulnerability in Discourse Discussion Platform
CVE-2026-27153

1.3LOW

Key Information:

Vendor

Discourse
Status
Discourse
Vendor
CVE Published:
26 February 2026

What is CVE-2026-27153?

Discourse, the open-source discussion platform, has a vulnerability that allows moderators to export user private messages via an insecure CSV export endpoint. This is due to an overly permissive allowlist in the can_export_entity? function, which fails to adequately restrict entities that can be exported. The issue affects versions prior to 2025.12.2, 2026.1.1, and 2026.2.0, where it has been patched. Admins are urged to update their installations to safeguard user data against unauthorized access.

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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:
1.3
Severity:
LOW
Confidentiality:
None
Integrity:
Low
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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