CVE-2026-107177 PUBLISHED

Express Gateway through 1.16.11 Hardcoded Default cipherKey Exposes OAuth Tokens

Assigner: VulnCheck
Reserved: 07.10.2026 Published: 07.10.2026 Updated: 07.10.2026

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.

CVSS Vector: CVSS:4.0/AV:N/AC:H/AT:P/PR:H/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
CVSS Score: 7.4

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	High	Confidentiality	None
Attack Complexity	High	Integrity	High	Integrity	None
Attack Requirements	Present	Availability	None	Availability	None
Privileges Required	High
User Interaction	None

CVSS 4.0

CVSS Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:N
CVSS Score: 5.9

Attack Vector	Network	Scope	Unchanged
Attack Complexity	High	Confidentiality Impact	High
Privileges Required	High	Integrity Impact	High
User Interaction	None	Availability Impact	None

CVSS 3.1

Product Status

Vendor	ExpressGateway
Product	express-gateway
Versions	Default: unaffected affected from 0 to 1.16.11 (incl.)

CVE-2026-107177 PUBLISHED

Express Gateway through 1.16.11 Hardcoded Default cipherKey Exposes OAuth Tokens

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Problem Types