CVE-2026-49256 Discourse: Hidden tag names leaked via category serializers

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 allowedtags, allowedtaggroups, or required tag groups could leak to anonymous and unauthorized users through categor...

CVE-2026-58371 SeaweedFS < 4.30 - Cross-Origin Information Disclosure via Unvalidated JSONP callback Parameter

SeaweedFS before 4.30 reflects the callback query parameter verbatim into responses served with Content-Type application/javascript in the shared writeJson helper weed/server/common.go, with no callback-name validation, no X-Content-Type-Options: nosniff header, and no CORS allow-list. Every JSON...

CVE-2025-54591 FreshRSS: Unauthenticated users can view default user's information

FreshRSS is a free, self-hostable RSS aggregator. Versions 1.26.3 and below expose information about feeds and tags of default admin users, due to lack of access checking in the FreshRSSAuth::hasAccess function used by some of the tag/feed related endpoints. FreshRSS controllers usually have a...