CVE-2026-107162 Express Gateway through 1.16.11 OAuth 2.0 Refresh Token Validation Bypass
- Exploited in the wild
- Not known
- Fix
- None listed
What is CVE-2026-107162?
CVE-2026-107162 is a high-severity vulnerability in ExpressGateway express-gateway, published on 7 Oct 2026.
Official 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.
Weakness: CWE-287
Which versions are affected by CVE-2026-107162?
How do I fix CVE-2026-107162?
No fix has been published for CVE-2026-107162 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-107162 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-107162 exists.
Sources
Also known as GHSA-p6v9-9m69-qjxm.