CVEvulnerability
CVE-2026-56329
5.3 MEDIUM
Official page ↗
- Status
- Deferred
- Published
- 2026-07-10
- Last modified
- 2026-07-10
- Assigner
- [email protected]
- CVSS 4.0 ([email protected])
- 5.3 MEDIUM — CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:L/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
- CVSS 3.1 ([email protected])
- 6.4 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:L
- Weaknesses
- CWE-436
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.
Related
Weakness · CWE (1)
- CWE-436 Interpretation Conflict weakness
References
- https://github.com/Cap-go/capgo/security/advisories/GHSA-76qq-gg2p-pwwj github.com
- https://www.vulncheck.com/advisories/capgo-cross-tenant-preview-namespace-collision-via-non-bijective-underscore-decoding www.vulncheck.com
- https://github.com/Cap-go/capgo/security/advisories/GHSA-76qq-gg2p-pwwj github.com