---
id: CVE-2026-56215
title: Capgo - Account Merge via Poisoned public.users.email in SSO Provisioning
summary: >-
  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 vict…
severity: high
cvss: 8.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L'
cvssSource: cna
cwe:
  - CWE-639
vendor: Capgo
product: Capgo
affected:
  - Capgo < 12.128.12
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-06-24T18:08:07.049529Z'
exploitAvailable: true
published: '2026-06-20'
updated: '2026-11-08'
sourceUpdated: '2026-11-08T14:05:36.024Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-56215'
references:
  - url: 'https://github.com/Cap-go/capgo/security/advisories/GHSA-wqc6-fhwf-qpww'
    label: GitHub Security Advisory (GHSA-wqc6-fhwf-qpww)
  - url: >-
      https://www.vulncheck.com/advisories/capgo-account-merge-via-poisoned-public-users-email-in-sso-provisioning
    label: >-
      VulnCheck Advisory: Capgo - Account Merge via Poisoned public.users.email
      in SSO Provisioning
tags:
  - cve.org
  - exploit-available
epss: 0.00388
epssPercentile: 0.33199
ingestedAt: '2026-11-08T14:51:22.368Z'
---

## Overview

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.

## Affected

- `Capgo < 12.128.12`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.