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Low severity2.7NVD Advisory· Published Feb 26, 2026· Updated Jun 17, 2026

CVE-2026-28227

CVE-2026-28227

Description

Discourse is an open source discussion platform. Prior to versions 2025.12.2, 2026.1.1, and 2026.2.0, TL4 users can publish topics into staff-only categories via the publish_to_category topic timer, bypassing authorization checks. Versions 2025.12.2, 2026.1.1, and 2026.2.0 patch the issue. No known workarounds are available.

Affected products

5
  • Discourse (software)/Discourse4 versions
    cpe:2.3:a:discourse:discourse:*:*:*:*:*:*:*:*+ 3 more
    • cpe:2.3:a:discourse:discourse:*:*:*:*:*:*:*:*range: <2025.12.2
    • cpe:2.3:a:discourse:discourse:2026.2.0:*:*:*:latest:*:*:*
    • (no CPE)range: <2025.12.2, <2026.1.1, <2026.2.0
    • (no CPE)range: < 2025.12.2
  • osv-coords
    pkg:bitnami/discourse
    Range: < 2025.12.2

Patches

Vulnerability mechanics

References

1

News mentions

1