CVE-2026-56329
Capgo - Cross-Tenant Preview Namespace Collision via Non-Bijective Underscore Decoding
CVSS Score
6.4
EPSS Score
0.0%
EPSS Percentile
0th
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 misrouting and denial of preview access for victim applications.
| CWE | CWE-436 |
| Vendor | capgo |
| Product | capgo |
| Published | Jul 10, 2026 |
| Last Updated | Jul 10, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:L Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Changed
Confidentiality
None
Integrity
Low
Availability
Low
Affected Versions
Capgo / Capgo
0 < 12.128.2
References
Credits
🔍 Judel777