What is CVE-2026-56329?

CVE-2026-56329 is a medium-severity vulnerability in Capgo, classified under CWE-436. CVSS score: 6.4/10. Published 2026-07-10.

How severe is CVE-2026-56329?

Medium severity. CVSS v3 base score is 6.4 out of 10.

Vulnerability in Capgo

CVE-2026-56329

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.

EPSS: 0.002 (15.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:L.

Affected products

Capgo — versions 0, 12.128.2

Weakness classification (CWE)

CWE-436

References

disclosure@vulncheck.com (vendor-advisory)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2026-56329?: CVE-2026-56329 is a medium-severity vulnerability in Capgo, classified under CWE-436. CVSS score: 6.4/10. Published 2026-07-10.
How severe is CVE-2026-56329?: Medium severity. CVSS v3 base score is 6.4 out of 10.