CVE-2026-56215
HIGHCapgo - Account Merge via Poisoned public.users.email in SSO Provisioning
Title source: cnaDescription
Capgo before 12.128.12 allows authenticated users to modify their mutable public.users.email to arbitrary addresses, which the SSO provisioning endpoint trusts as an account-merge key. Attackers can pre-position their account with a victim's corporate SSO email, causing the provision-user endpoint to merge the victim's SSO identity into the attacker-controlled account.
References (2)
Core 2
Core References
Vendor Advisory vendor-advisory
GHSA Advisory GHSA-wqc6-fhwf-qpww
https://github.com/Cap-go/capgo/security/advisories/GHSA-wqc6-fhwf-qpww
Third Party Advisory third-party-advisory
VulnCheck Advisory: Capgo - Account Merge via Poisoned public.users.email in SSO Provisioning
https://www.vulncheck.com/advisories/capgo-account-merge-via-poisoned-public-users-email-in-sso-provisioning
Scores
CVSS v3
8.3
EPSS
0.0023
EPSS Percentile
13.5%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L
CISA SSVC
Vulnrichment
Exploitation
poc
Automatable
no
Technical Impact
partial
Details
CWE
CWE-639
Status
published
Products (2)
Capgo/Capgo
< 12.128.12
Capgo/Capgo
12.128.12
Published
Jun 20, 2026
Tracked Since
Jun 20, 2026