Discourse Allows Unauthorized Access to Deleted Posts Index… (CVE-2026-33428)

Summary

Discourse Allows Unauthorized Access to Deleted Posts Index via Group Membership

Original description

The description as published by the source.

Discourse is an open-source discussion platform. Prior to versions 2026.3.0, 2026.2.1, and 2026.1.2, a non-staff user with elevated group membership could access deleted posts belonging to any user due to an overly broad authorization check on the deleted posts index endpoint. Versions 2026.3.0, 2026.2.1, and 2026.1.2 contain a patch. No known workarounds are available.

Source: OSV.dev (Open Source Vulnerabilities) NVD GitHub Advisory OSV

Affected packages

Bitnami discourse

[{"type":"SEMVER","events":[{"introduced":"2026.1.0"},{"fixed":"2026.1.2"},{"introduced":"2026.2.0"},{"fixed":"2026.2.1"},{"introduced":"2026.3.0"},{"fixed":"2026.3.0"}]}]

References

advisory github.com
web nvd.nist.gov