CVE-2026-56336 | THREATINT

Description

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.

PUBLISHED Reserved 2026-06-20 | Published 2026-07-12 | Updated 2026-07-14 | Assigner VulnCheck

MEDIUM: 6.9CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

MEDIUM: 5.3CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Problem types

Exposure of Sensitive Information to an Unauthorized Actor

Product status

Default status

unaffected

Any version before 12.128.2

affected

12.128.2 (semver)

unaffected

Credits

offset reporter

References

github.com/.../capgo/security/advisories/GHSA-c5jf-5wxg-mgrq exploit

github.com/.../capgo/security/advisories/GHSA-c5jf-5wxg-mgrq (GitHub Security Advisory (GHSA-c5jf-5wxg-mgrq)) vendor-advisory

www.vulncheck.com/...authenticated-sso-check-domain-endpoint (VulnCheck Advisory: Capgo - Information Disclosure via Unauthenticated SSO check-domain Endpoint) third-party-advisory

cve.org (CVE-2026-56336)

nvd.nist.gov (CVE-2026-56336)

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