All vulnerabilities
CVE-2026-107162

express-gateway: Express Gateway through 1.16.11 OAuth 2.0 Refresh Token Validation Bypass

ExpressGateway express-gatewayFrameworks
Open in ThreatlineRecord JSON
CVSS
7.6High
ExploitationPublic exploit codeCISA's assessment says proof of concept code is public, assessed 10 Oct 2026. Not in the KEV catalogCISA via CVE List
Exploit odds (EPSS)0.29%Chance of exploitation activity in the next 30 days, higher than 20% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed inNone listedNo source names a fixed version. Check the vendor advisory below
Published7 Oct 2026Updated 10 Oct 2026CVE List

What fixes it

No source in this snapshot names a fixed version. The vendor advisories under References are the place to check.

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.

Text from CVE List

Affected versions 1

  • express-gatewayaffected: all versions through 1.16.11CVE List

References 5