CVE-2026-33428 | THREATINT

Description

Discourse is an open-source discussion platform. Prior to versions 2026.3.0-latest.1, 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-latest.1, 2026.2.1, and 2026.1.2 contain a patch. No known workarounds are available.

PUBLISHED Reserved 2026-03-19 | Published 2026-03-20 | Updated 2026-03-25 | Assigner GitHub_M

MEDIUM: 4.9CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U

Problem types

CWE-863: Incorrect Authorization

Product status

= 2026.3.0-latest

affected

>= 2026.2.0-latest, < 2026.2.1

affected

>= 2026.1.0-latest, < 2026.1.2

affected

References

github.com/...course/security/advisories/GHSA-frcw-p4mc-x6mp

cve.org (CVE-2026-33428)

nvd.nist.gov (CVE-2026-33428)

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