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Capgo CVE-2026-56247

| EUVDEUVD-2026-40429 HIGH
Incorrect Privilege Assignment (CWE-266)
2026-06-30 VulnCheck GHSA-j363-jrwq-xw9c
8.7
CVSS 4.0 · Vendor: VulnCheck
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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain

  1. Access
    Authenticate as org admin
  2. Delivery
    Assign org-scoped role at app scope
  3. Exploit
    Target pending invitee binding
  4. Execution
    Invitee accepts invite, binding persists
  5. Impact
    Low-priv user performs privileged app actions

Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A06:2025 - Insecure Design
ASVS 5.0
V8 - Authorization Privilege assignment review
Exploitation Conditions

Exploitation requires an authenticated account holding org-admin privileges within a Capgo organization (PR:L), and the specific abuse path is assigning an org-scoped RBAC role at app scope - the missing scope-compatibility check is the enabling condition. The pre-seeding variant additionally requires targeting a pending (not-yet-accepted) invitee so the malformed binding survives invite acceptance. Limiting factors: the attacker must already control an org-admin role, the affected instance must be running a version before 12.128.2, and the elevated privileges are confined to app-level actions within the tenant (SC:N/SI:N/SA:N - no impact to other systems). No end-user interaction is needed for the assignment itself (UI:N).

Impact

The CVSS 4.0 base score is 8.7 (High) with vector AV:N/AC:L/AT:N/PR:L/UI:N and high confidentiality, integrity, and availability impact to the vulnerable system but no subsequent-system impact (SC:N/SI:N/SA:N). The PR:L metric correctly reflects that exploitation requires an authenticated account with org-admin privileges - a meaningful trust prerequisite, so this is an insider/abuse-of-privilege or compromised-admin scenario rather than anonymous internet exploitation. No EPSS score, SSVC decision, KEV listing, or public POC was provided, so there is no signal of active or automatable exploitation; the real-world urgency is therefore driven by the high impact and low attack complexity rather than by exploitation evidence. Net: a genuine authorization-design weakness worth prompt patching for any multi-tenant Capgo deployment, but the org-admin precondition meaningfully narrows the realistic threat compared to the raw High score.

Exploit ScenarioDerived

A malicious or compromised org admin assigns an org-scoped high-privilege RBAC role at app scope to a pending invitee whose intended role is low-privilege. When that invitee later accepts the invitation, the over-privileged binding persists, and the now-active low-privilege user can perform privileged app actions (e.g., managing app updates or channels) they were never meant to have. No public exploit code is known, and the attack requires existing org-admin access.

This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).
Patch available 0.3% exploitation probability (EPSS)

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AnalysisAIv1 – Jun 30, 2026

Privilege escalation in Capgo before 12.128.2 lets an authenticated org admin assign org-scoped RBAC roles at the narrower app scope without any validation of scope compatibility, and to do so even for pending (not-yet-accepted) invitees. Because these malformed high-privilege bindings persist through invite acceptance, a nominally low-privilege user who accepts the invite gains unauthorized privileged app-level actions. No public exploit has been identified at time of analysis, and the issue is not listed in CISA KEV.

RemediationAI

Vendor-released patch: upgrade Capgo to 12.128.2 or later, which adds validation of role-scope compatibility during assignment. Before or in addition to patching, audit existing role bindings for org-scoped roles that have been bound at app scope and revoke any malformed high-privilege grants, paying particular attention to bindings attached to pending invitations that have not yet been accepted. As an operational compensating control where immediate upgrade is not possible, restrict who holds org-admin rights and review the invite queue so that crafted bindings cannot survive to acceptance - the trade-off is added administrative overhead and slower onboarding. Refer to GHSA-55q2-p3m2-x66x (https://github.com/Cap-go/capgo/security/advisories/GHSA-55q2-p3m2-x66x) and the VulnCheck advisory for authoritative guidance.

Affected VersionsENISA

capgo 0 <12.128.2

Affected Packages

euvd capgo fix: 12.128.2

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in euvd

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

Capgo is an open-source live/OTA update service and Capacitor plugin used to push code updates to mobile apps; the affected component is its multi-tenant RBAC (role-based access control) authorization layer, identified by the CPE cpe:2.3:a:capgo:capgo. The flaw maps to CWE-266 (Incorrect Privilege Assignment): the role-binding logic accepts a role defined for one scope (org) and binds it at a different scope (app) without checking that the role's scope is compatible with the target. Compounding this, bindings can be created for invitees who have not yet accepted, so the authorization check that should occur at assignment time is effectively bypassed and the stale, over-privileged grant is materialized once the user joins.

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Severity by source

Vendor (VulnCheck) PRIMARY 8.7 HIGH
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
vuln.today AI 8.8 HIGH

Network-reachable multi-tenant service abused by an authenticated org admin (PR:L, AC:L, UI:N); privilege escalation yields high CIA within the tenant with no scope change to other systems.

3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
4.0 AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Primary rating from Vendor (VulnCheck).

CVSS VectorVendor: VulnCheck

Attack Vector
Network
Attack Complexity
Low
Attack Requirements
None
Privileges Required
Low
User Interaction
None
Vulnerable system: Confidentiality
High
Vulnerable system: Integrity
High
Vulnerable system: Availability
High
Subsequent system: Confidentiality
None
Subsequent system: Integrity
None
Subsequent system: Availability
None

Lifecycle Timeline

1
Patch available
Jul 01, 2026 - 02:16 EUVD

DescriptionCVE.org

Capgo before 12.128.2 allows org admins to assign org-scoped RBAC roles at app scope without validating role scope compatibility, including to pending invitees. Attackers can pre-seed malformed high-privilege bindings that survive invite acceptance, enabling accepted low-privilege users to perform unauthorized privileged app actions.

Executive ViewAI

Why It Matters

Capgo contains a privilege escalation vulnerability affecting versions before 12.128.2 that allows authenticated administrators to assign elevated permissions to users in excess of their authorized scope. Users who accept invitations with these improperly scoped permissions gain unauthorized access that persists after acceptance, potentially exposing sensitive application features and data. This creates a significant access control risk for organizations relying on Capgo for managing user permissions.

Business Impact: High
Compensating Controls

No vendor-released patch identified at time of analysis. Interim mitigations: (1) Revoke and re-validate all app-level role assignments to verify they match intended access levels; (2) Implement mandatory approval workflow for organization administrators assigning app-level roles; (3) Restrict organization administrator role to minimum necessary personnel; (4) Require user verification of assigned roles and permissions before invitation acceptance, alerting on any scope mismatches; (5) Monitor access logs and audit trails for unauthorized privilege escalation patterns.

Threat Intelligence Overview

EPSS Score
0.3%
Top 78% exploitable
Prevalence
Low
niche open-source OTA-update tool for Capacitor mobile developers
Data Quality
5 sources
Confidence: Medium

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity HIGH
CISA KEV No
Public POC No
EPSS 0.3%
Patch available Yes
Active threat No
Deciding rule
HIGH severity (CVSS 7.0-8.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision
Scheduled
Exploitation
Poc
System Exposure· derived
Open
Automatable
No
Human Impact
High
Technical Impact
Total

Priority Score

44
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +44
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Authentication bypass attacks exploit flaws in the verification mechanisms that control access to systems and applications.

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