EUVD-2026-38428
GHSA-44jx-wxxg-x6pv
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:L/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-reachable API exploitable with any valid app-scoped key (PR:L, AC:L, UI:N); sibling key disclosure and tampering give C:H/I:H, with deletion causing partial A:L.
Primary rating from Vendor (VulnCheck).
CVSS VectorVendor: VulnCheck
Lifecycle Timeline
2DescriptionCVE.org
Capgo before 12.128.2 contains an authorization bypass vulnerability in its public API key management handlers (get/put/delete/post). API keys created with mode=all but restricted to a single app via limited_to_apps are only checked for limited_to_orgs and not for limited_to_apps, so an app-scoped key can enumerate, update, and delete sibling API keys belonging to the same account that are outside its declared app scope, enabling tampering with account-level credentials.
AnalysisAI
Authorization bypass in Capgo before 12.128.2 lets authenticated holders of an app-scoped public API key enumerate, modify, or delete other API keys on the same account that belong to different applications. The flaw stems from missing limited_to_apps enforcement in the get/put/delete/post key-management handlers, which only validate the limited_to_orgs scope. No public exploit identified at time of analysis, though the issue is disclosed via a GitHub Security Advisory and VulnCheck.
Technical ContextAI
Capgo is an open-source live-update and over-the-air (OTA) delivery platform for Capacitor-based mobile applications, distributed primarily via the Cap-go/capgo project. Its public API uses scoped API keys where a key created with mode=all is intended to be further constrained by two orthogonal scopes: limited_to_orgs (organization scope) and limited_to_apps (per-application scope). The vulnerable handlers correctly evaluate the organization scope but omit the per-app scope check, producing a CWE-269 Improper Privilege Management condition: a credential is granted broader effective authority than its declared scope implies, breaking the isolation boundary between sibling apps under the same account.
RemediationAI
Vendor-released patch: upgrade Capgo to 12.128.2 or later, per GHSA-hwc7-j2p6-43xp (https://github.com/Cap-go/capgo/security/advisories/GHSA-hwc7-j2p6-43xp). Until the upgrade can be deployed, the most effective compensating control is to rotate and stop issuing mode=all keys that rely on limited_to_apps for isolation - replace them with keys whose mode is narrowed to only the operations required (read/write/upload) so the affected get/put/delete/post key-management endpoints are not reachable; the trade-off is that workflows expecting a single broad key may need to be split into per-purpose keys. Additionally, audit account API key inventories for unexpected creations, modifications, or deletions performed by app-scoped keys, and revoke any credentials whose provenance cannot be confirmed.
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-269 – Improper Privilege Management
View allSame technique Privilege Escalation
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External POC / Exploit Code
Leaving vuln.today