CVE-2026-107177
MediumCVSS 5.9Exploitation Probability (EPSS)
Low risk23th percentile - higher than 23% of all known CVEs
Summary
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.
Risk Assessment
Exposure of OAuth 2.0 token secrets and potential account takeover, leading to unauthorized access to protected resources.
Recommendation
Change the default encryption key to a unique, strong key and restrict access to the datastore (e.g., Redis).
Other vulnerabilities in Express Gateway
Original NVD description (English source)
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.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS