CVE-2026-107162— Express Gateway through 1.16.11 OAuth 2.0 Refresh Token Validation Bypass
Quick assessment
Affected
ExpressGateway express-gateway
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.
Express Gateway 1.16.11 及更早版本在 OAuth 2.0 refresh_token 授权流程中存在身份验证绕过漏洞。该漏洞未能正确验证令牌秘密或颁发令牌的客户端。攻击者只要拥有任意有效的客户端凭据，以及另一个用户的 refresh_token 中的标识符部分，即可获取该用户的访问令牌，并在受 OAuth2 保护的 API 中冒充该用户。
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I. Basic Information for CVE-2026-107162
Vulnerability Information
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Vulnerability Title
Express Gateway through 1.16.11 OAuth 2.0 Refresh Token Validation Bypass
Source: CVE Program / CVE List V5
Vulnerability Description
Express Gateway through 1.16.11 contains an authentication bypass vulnerability in the OAuth 2.0 refresh_token grant that fails to validate the token secret or issuing client. Attackers with any valid client credentials and the identifier portion of another user's refresh token can obtain that user's access token and impersonate them against oauth2-protected APIs.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
认证机制不恰当
Source: CVE Program / CVE List V5
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| ExpressGateway | express-gateway | 0 ~ 1.16.11 | - |
|
II. Public POCs for CVE-2026-107162
| # | POC Description | Source Link | Shenlong Link |
|---|
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Other References for CVE-2026-107162 (5)
IV. Related Vulnerabilities
Same weakness: CWE-287
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V. Comments for CVE-2026-107162
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