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.
Advisories

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Fixes

Solution

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Workaround

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History

Wed, 07 Oct 2026 13:00:00 +0000

Type Values Removed Values Added
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.
Title Express Gateway through 1.16.11 OAuth 2.0 Refresh Token Validation Bypass
First Time appeared Express-gateway
Express-gateway express-gateway Docker Image
Weaknesses CWE-287
CPEs cpe:2.3:a:express-gateway:express-gateway_docker_image:*:*:*:*:*:*:*:*
Vendors & Products Express-gateway
Express-gateway express-gateway Docker Image
References
Metrics cvssV3_1

{'score': 6.8, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N'}

cvssV4_0

{'score': 7.6, 'vector': 'CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-10-07T12:48:18.499Z

Reserved: 2026-10-07T11:02:13.828Z

Link: CVE-2026-107162

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-10-07T13:17:19.963

Modified: 2026-10-07T13:17:19.963

Link: CVE-2026-107162

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses