High severity7.5NVD Advisory· Published Jul 9, 2026· Updated Jul 14, 2026
CVE-2026-49256
CVE-2026-49256
Description
Discourse is an open-source discussion platform. Prior to 2026.6.0, 2026.5.1, 2026.4.2, and 2026.1.5, restricted tag and tag-group names attached to publicly readable categories as allowed_tags, allowed_tag_groups, or required tag groups could leak to anonymous and unauthorized users through category and group endpoints. This issue is fixed in versions 2026.6.0, 2026.5.1, 2026.4.2, and 2026.1.5.
Affected products
4<2026.6.0, <2026.5.1, <2026.4.2, <2026.1.5+ 2 more
- (no CPE)range: <2026.6.0, <2026.5.1, <2026.4.2, <2026.1.5
- cpe:2.3:a:discourse:discourse:*:*:*:*:*:*:*:*range: >=2026.1.0,<2026.1.5
- cpe:2.3:a:discourse:discourse:2026.6.0:*:*:*:latest:*:*:*
Patches
Vulnerability mechanics
References
5- github.com/discourse/discourse/releases/tag/v2026.1.5nvdRelease NotesPatch
- github.com/discourse/discourse/security/advisories/GHSA-mwp7-572g-6qpxnvdVendor AdvisoryMitigation
- github.com/discourse/discourse/releases/tag/v2026.4.2nvdRelease Notes
- github.com/discourse/discourse/releases/tag/v2026.5.1nvdRelease Notes
- github.com/discourse/discourse/releases/tag/v2026.6.0nvdRelease Notes
News mentions
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