What’s Vulnerable › Vulnerabilities
CVE-2026-27481: Discourse: Hidden tag visibility bypass on tag routes
- Severity: medium (CVSS 5.3 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.2% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-04-03 · updated 2026-07-24
- Weakness: CWE-200
Description
Discourse is an open-source discussion platform. From versions 2026.1.0-latest to before 2026.1.3, 2026.2.0-latest to before 2026.2.2, and 2026.3.0-latest to before 2026.3.0, an authorization bypass vulnerability allows unauthenticated or unauthorized users to view hidden (staff-only) tags and its associated data. All Discourse instances with tagging enabled and staff-only tag groups configured are impacted. This issue has been patched in versions 2026.1.3, 2026.2.2, and 2026.3.0.
Affected products
- discourse: from 2026.1.0 through 2026.1.2; from 2026.2.0 through 2026.2.1; 2026.3.0
References
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