CVE-2026-107177

Express Gateway through 1.16.11 Hardcoded Default cipherKey Exposes OAuth Tokens

7.4 High

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.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: High
Privileges needed: High
User interaction: None

What an attacker can affect

Confidentiality: High
Integrity: High
Availability: None

Exploit likelihood

0.32%Unchanged since Oct 8, 2026

What each source reports

CVE List Score used 7.4

Express Gateway through 1.16.11 Hardcoded Default cipherKey Exposes OAuth Tokens

Record: CVE-2026-107177
CVSS 4.0: 7.4 HighCVSS: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 3.1: 5.9 MediumCVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:N
Weakness: CWE-1394
Updated: 2026-11-02

EUVDEUVD-2026-94317 7.4

Record: EUVD-2026-94317
CVSS 4.0: 7.4 HighCVSS:4.0/AV:N/AC:H/AT:P/PR:H/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
Updated: 2026-11-02

GitHub AdvisoriesGHSA-rq2q-fwh6-p47r 7.4

Express Gateway through 1.16.11 contains a hardcoded cryptographic key vulnerability that allows...

Record: GHSA-rq2q-fwh6-p47r
CVSS 4.0: 7.4 HighCVSS:4.0/AV:N/AC:H/AT:P/PR:H/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS 3.1: 5.9 MediumCVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:N
Weakness: CWE-1394
Updated: 2026-11-02

NVD 7.4

Record: CVE-2026-107177
CVSS 4.0: 7.4 HighCVSS:4.0/AV:N/AC:H/AT:P/PR:H/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS 3.1: 5.9 MediumCVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:N
Weakness: CWE-1394
Updated: 2026-11-02

OSV 7.4

Express Gateway through 1.16.11 Hardcoded Default cipherKey Exposes OAuth Tokens

Record: CVE-2026-107177
CVSS 4.0: 7.4 HighCVSS:4.0/AV:N/AC:H/AT:P/PR:H/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
Weakness: CWE-1394
Updated: 2026-11-02

Affected products

expressgateway express-gateway

History

History
Recorded	Changed	Sources
Nov 2, 2026	first indexed	CVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-107177 is a high vulnerability (CVSS 7.4) in Expressgateway Express-gateway, published October 7, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.32%, the 24th percentile. No source names a fixed version.