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CVE-2026-49256

Discourse: Hidden tag names leaked via category serializers PUBLISHED

Description (CNA)

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 (CNA)

Vendor / productVersions
discourse / discourseaffected >= 2026.1.0-latest, < 2026.1.5; affected >= 2026.4.0-latest, < 2026.4.2; affected >= 2026.5.0-latest, < 2026.5.1

CWE

CWE-200

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.