CVE-2026-107177 Express Gateway through 1.16.11 Hardcoded Default cipherKey Exposes OAuth Tokens
Attackers with datastore access can decrypt OAuth tokens using a hardcoded key, enabling unauthorized access to user accounts.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-107177?
CVE-2026-107177 is a high-severity vulnerability in ExpressGateway express-gateway, published on 7 Oct 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
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.
Weakness: CWE-1394
Which versions are affected by CVE-2026-107177?
How do I fix CVE-2026-107177?
No fix has been published for CVE-2026-107177 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-107177 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-107177 exists.
Sources
Also known as GHSA-rq2q-fwh6-p47r.