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CVE-2026-56223

HIGH Exploitation: PoC
8.7
CVSS 3.1
Description
Capgo before 12.128.2 contains a cross-domain SSO account takeover vulnerability in the provision-user endpoint that allows attackers to merge arbitrary victim accounts based on email match without validating SSO provider domain authorization. An attacker with enterprise org admin access and a malicious IdP can forge SAML assertions containing victim email addresses to trigger account merge and gain full access to victim accounts, organizations, and data.

Metadata

CVE ID
CVE-2026-56223
State
PUBLISHED
Assigner
VulnCheck
Reserved
2026-06-19 21:46 UTC
Published
2026-06-24 11:53 UTC
Last updated
2026-06-24 13:46 UTC
Primary CWE
CWE-287
Improper Authentication
Vendor / Product
Capgo / Capgo
Sources
cve.org  ·  NVD

Severity & Metrics

8.7 HIGH CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N
SSVC — CISA Coordinator
Exploitation
PoC
Automatable
no
Tech. Impact
partial
Affected products (1)
VendorProductPlatformVersions
Capgo Capgo — 0 < 12.128.2, 12.128.2
Weakness (CWE)
CWESourceDescription
CWE-287 cna Improper Authentication
CVSS scores (2)
ScoreSeverityVersionSourceVector
9.3 CRITICAL 4.0 cna CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N
8.7 HIGH 3.1 cna CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N
References (2)
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