Unrated severityNVD Advisory· Published Jul 10, 2026· Updated Jul 10, 2026
Capgo - Cross-Tenant Preview Namespace Collision via Non-Bijective Underscore Decoding
CVE-2026-56329
Description
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.
Affected products
2Patches
Vulnerability mechanics
References
2- github.com/Cap-go/capgo/security/advisories/GHSA-76qq-gg2p-pwwjmitrevendor-advisory
- www.vulncheck.com/advisories/capgo-cross-tenant-preview-namespace-collision-via-non-bijective-underscore-decodingmitrethird-party-advisory
News mentions
0No linked articles in our index yet.