CVE-2026-56329 Capgo - Cross-Tenant Preview Namespace Collision via Non-Bijective Underscore Decoding

Capgo before 12.128.2 contains a cross-tenant preview namespace collision vulnerability caused by non-bijective decoding of double underscores to dots in preview hostname parsing. Attackers can register app IDs with underscores that collide with other tenants' dotted app IDs, causing preview...

CVE-2026-56329

CVE-2026-56329 affects Capgo before 12.128.2. The issue arises from non-bijective decoding of double underscores to dots in preview hostname parsing, causing a cross-tenant preview namespace collision. Attackers can register app IDs with underscores that collide with other tenants’ dotted app IDs...