CVE-2026-107177
Express Gateway through 1.16.11 Hardcoded Default cipherKey Exposes OAuth Tokens
CVSS Score
5.9
EPSS Score
0.0%
EPSS Percentile
0th
Express Gateway through 1.16.11 contains a hardcoded cryptographic key vulnerability that allows attackers with datastore access to decrypt stored OAuth 2.0 token secrets via the default crypto.cipherKey 'sensitiveKey'. Attackers who can read Redis can decrypt tokenEncrypted values and combine them with stored token IDs to obtain valid bearer tokens for any user.
| CWE | CWE-1394 |
| Vendor | expressgateway |
| Product | express-gateway |
| Published | Oct 7, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:N Attack Vector
Network
Attack Complexity
High
Privileges Required
High
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
None
Affected Versions
ExpressGateway / express-gateway
0 ≤ 1.16.11
References
github.com: https://github.com/ExpressGateway/express-gateway/issues/1078 github.com: https://github.com/ExpressGateway/express-gateway github.com: https://github.com/ExpressGateway/express-gateway/blob/45612814d12f65889ef3bdf80b2ed7ab9b557736/lib/config/system.config.yml#L15-L22 github.com: https://github.com/ExpressGateway/express-gateway/blob/45612814d12f65889ef3bdf80b2ed7ab9b557736/lib/services/utils.js#L18-L28 vulncheck.com: https://www.vulncheck.com/advisories/express-gateway-through-1.16.11-hardcoded-default-cipherkey-exposes-oauth-tokens
Credits
MD Mahmidul Hasan