Information disclosure in Capgo
CVE-2026-56336
Capgo before 12.128.2 contains an information disclosure vulnerability in the unauthenticated /private/sso/check-domain endpoint that returns internal org_id and provider_id values. Attackers can enumerate email domains to build mappings of domains to organization UUIDs and SSO provider identifiers, enabling reconnaissance against Capgo tenants.
Vulnerability class: Information Disclosure
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.
EPSS exploit prediction
EPSS: 0.003 (25.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 26th percentile — 25.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000
Affected products
- Capgo — versions 0, 12.128.2
Weakness classification (CWE)
References
- github.com/Cap-go/capgo/security/advisories/GHSA-c5jf-5wxg-mgrq (vendor-advisory)
- www.vulncheck.com/advisories/capgo-information-disclosure-via-unauthenticated-s… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-56336?
- CVE-2026-56336 is a medium-severity vulnerability in Capgo, classified under Information Disclosure. CVSS score: 5.3/10. Published 2026-07-12.
- How severe is CVE-2026-56336?
- Medium severity. CVSS v3 base score is 5.3 out of 10.