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CVE-2026-56299— Capgo - Denial of Service via Unauthenticated OPTIONS Request to /build/upload Endpoint

Quick assessment

Affected
Capgo Capgo
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Capgo是CAPGO公司的一个专为CapacitorJS开发者打造的移动应用开发和更新平台。 Capgo 12.128.2之前版本存在授权问题漏洞，该漏洞源于/build/upload/:jobId/*端点存在认证绕过，可能导致未经验证的攻击者发送OPTIONS请求绕过身份验证中间件并调用tusProxy逻辑，从而触发请求泛洪和拒绝服务攻击。

CVSS 5.3 · Medium EPSS 0.68% · P51

Affected Version Matrix 2

VendorProduct Version RangeStatus
Capgo Capgo < 12.128.2 affected
12.128.2 unaffected
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I. Basic Information for CVE-2026-56299

Vulnerability Information
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Vulnerability Title
Capgo - Denial of Service via Unauthenticated OPTIONS Request to /build/upload Endpoint
Source: CVE Program / CVE List V5
Vulnerability Description
Capgo before 12.128.2 contains an authentication bypass vulnerability in the /build/upload/:jobId/* endpoint that allows unauthenticated attackers to trigger consistent 500 errors. Remote attackers can send OPTIONS requests to bypass authentication middleware and invoke tusProxy logic with invalid credentials, enabling trivial request flooding and denial of service.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
关键功能的认证机制缺失
Source: CVE Program / CVE List V5
Vulnerability Title
Capgo 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Capgo是CAPGO公司的一个专为CapacitorJS开发者打造的移动应用开发和更新平台。 Capgo 12.128.2之前版本存在授权问题漏洞，该漏洞源于/build/upload/:jobId/*端点存在认证绕过，可能导致未经验证的攻击者发送OPTIONS请求绕过身份验证中间件并调用tusProxy逻辑，从而触发请求泛洪和拒绝服务攻击。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Capgo Capgo 0 ~ 12.128.2 -

II. Public POCs for CVE-2026-56299

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III. Intelligence Information for CVE-2026-56299

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Vendor Advisories for CVE-2026-56299 (2)

Same Patch Batch · Capgo · 2026-06-21 · 7 CVEs total

CVE-2026-56239 7.6 HIGH Capgo - Privilege Escalation via SECURITY DEFINER Function apply_usage_overage
CVE-2026-56242 7.5 HIGH Capgo - Unauthenticated API Key Validity Oracle and User Identity Disclosure via get_ident
CVE-2026-56253 7.5 HIGH Capgo - Unauthenticated Organization Member Email Disclosure via get_org_members RPC
CVE-2026-56229 6.5 MEDIUM Capgo - Cross-App Build Job Access via app_id/job_id Mismatch in /build/status and /build/
CVE-2026-56251 6.5 MEDIUM Capgo - Privilege Escalation via Broken Row Level Security in org_users
CVE-2026-56236 6.1 MEDIUM Capgo CLI - Arbitrary File Overwrite via Symlink-Following in Local Credential Operations

IV. Related Vulnerabilities

Same product: Capgo
Same vendor: Capgo
Same weakness: CWE-306

V. Comments for CVE-2026-56299

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