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CVE-2026-56306— Capgo - Subkey Enforcement Bypass via x-limited-key-id Header Parsing

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之前版本存在输入验证错误漏洞，该漏洞源于对x-limited-key-id标头的解析存在弱点，可能导致远程攻击者通过提交格式错误值、零值或重复标头来绕过子密钥强制执行，使用主API密钥上下文执行请求。

CVSS 6.4 · Medium EPSS 0.34% · P26

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-2026-56306

Vulnerability Information
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Vulnerability Title
Capgo - Subkey Enforcement Bypass via x-limited-key-id Header Parsing
Source: CVE Program / CVE List V5
Vulnerability Description
Capgo before 12.128.2 contains a weak parsing vulnerability in the x-limited-key-id header that allows attackers to bypass subkey enforcement by submitting malformed values, zero, or duplicate headers that result in NaN or falsy values. Remote attackers can manipulate the x-limited-key-id header to disable limited key scoping and execute requests using the main API key context instead of restricted subkey permissions.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
输入验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Capgo 输入验证错误漏洞
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之前版本存在输入验证错误漏洞，该漏洞源于对x-limited-key-id标头的解析存在弱点，可能导致远程攻击者通过提交格式错误值、零值或重复标头来绕过子密钥强制执行，使用主API密钥上下文执行请求。
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-2026-56306

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III. Intelligence Information for CVE-2026-56306

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Vendor Advisories for CVE-2026-56306 (1)

Other References for CVE-2026-56306 (1)

Same Patch Batch · Capgo · 2026-06-22 · 7 CVEs total

CVE-2026-56324 8.2 HIGH Capgo - Rate Limit Bypass via User-Controlled device_id Parameter
CVE-2026-56323 7.5 HIGH Capgo - Unauthenticated Channel Enumeration and App Oracle via GET /channel_self
CVE-2026-56314 7.1 HIGH Capgo - Deleted Bundle Selection via Missing Deletion Filter in /updates Endpoint
CVE-2026-56311 5.3 MEDIUM Capgo - Unauthenticated Cross-Tenant Disclosure via get_current_plan_max_org RPC
CVE-2026-56321 5.3 MEDIUM Capgo - Missing Authentication Middleware on GET /private/role_bindings Endpoint
CVE-2026-56255 4.3 MEDIUM Capgo - Denial of Service via Unlimited Demo App Creation

IV. Related Vulnerabilities

Same product: Capgo
Same vendor: Capgo
Same weakness: CWE-20

V. Comments for CVE-2026-56306

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