EUVD-2026-40437
GHSA-r9p9-p57v-w538
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Network endpoint reachable by any authenticated user (PR:L, AV:N, AC:L) with no interaction; primary impact is cross-tenant data integrity (I:H), minor data exposure (C:L), no availability impact.
Primary rating from Vendor (VulnCheck).
CVSS VectorVendor: VulnCheck
Lifecycle Timeline
2DescriptionCVE.org
Capgo before 12.128.2 contains an authorization flaw in POST /private/create_device that accepts a caller-supplied org_id parameter without validating it matches the target app's owner organization. Authenticated attackers can create device records for an application using a foreign organization identifier, bypassing the intended org/app authorization boundary.
AnalysisAI
Broken authorization in Capgo before 12.128.2 lets an authenticated attacker forge device records against any application by supplying an arbitrary org_id to POST /private/create_device, which the backend trusts without checking it matches the target app's owning organization. The CVSS 4.0 score of 7.1 reflects high integrity impact with low privileges required and no user interaction; no public exploit identified at time of analysis and the issue is not listed in CISA KEV.
Technical ContextAI
Capgo is a live/over-the-air (OTA) update service for Capacitor-based mobile applications, where a backend API manages apps, organizations, and registered devices. The vulnerable endpoint POST /private/create_device accepts a caller-supplied org_id and uses it as the authoritative organization context instead of deriving or validating ownership from the authenticated session and the target app. This is a classic CWE-285 (Improper Authorization) failure: the server performs an action on behalf of the caller without confirming the caller is authorized for the specified organization, allowing the org/app authorization boundary to be crossed. The affected component is identified by CPE cpe:2.3:a:capgo:capgo:*:*:*:*:*:*:*:*, with all versions prior to 12.128.2 impacted.
RemediationAI
Upgrade to Capgo 12.128.2 or later, which is the vendor-released patch addressing the org/app scope-mismatch in the device creation endpoint (see the advisory at https://github.com/Cap-go/capgo/security/advisories/GHSA-mhrc-qhq8-872f). If immediate upgrade is not possible, the most targeted compensating control is to restrict or proxy access to the POST /private/create_device endpoint and enforce, at a gateway or middleware layer, that the org_id in the request matches the authenticated caller's organization and the target app's owner - rejecting mismatches; the trade-off is added request-processing logic and potential breakage of legitimate cross-org tooling if any exists. Auditing existing device records for entries whose org_id does not match their app's owning organization is also recommended to detect prior abuse, with the caveat that this is detective rather than preventive.
Authentication bypass in Capgo before 12.128.2 lets remote unauthenticated attackers mint arbitrary API keys by tamperin
Cross-domain SSO account takeover in Capgo before 12.128.2 allows an attacker with enterprise org admin access and a mal
Account pre-registration hijack in Capgo before 12.128.2 lets a remote unauthenticated attacker claim an account under a
Authentication bypass in Capgo prior to version 12.128.2 lets attackers defeat email-based OTP verification by tampering
Rate-limit bypass in Capgo versions prior to 12.128.2 lets remote unauthenticated attackers flood the channel_self endpo
Cross-tenant data poisoning in Supabase Capgo before 12.128.2 allows remote unauthenticated attackers to corrupt billing
Server-side privilege escalation in Capgo before 12.128.2 lets authenticated users holding build permissions abuse a pat
Unauthenticated information disclosure in Capgo before 12.128.2 lets remote attackers query the /functions/v1/channel_se
Account takeover in Capgo before 12.128.2 stems from a password-change endpoint that omits current-password validation (
Information disclosure in Capgo (Capacitor live-update/OTA platform) before 12.128.2 lets unauthenticated callers abuse
Unauthenticated information disclosure in Capgo before 12.128.2 lets remote attackers read organization RBAC role bindin
Cross-tenant authorization bypass in Capgo before 12.128.2 lets authenticated users impersonate another tenant's limited
Same weakness CWE-285 – Improper Authorization
View allSame technique Authentication Bypass
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External POC / Exploit Code
Leaving vuln.today