Insertion of Sensitive Information Into Sent Data in follow-redirects - CVE-2026-116689
Published: November 4, 2026
Vulnerability identifier: #VU159302
CSH Severity: Medium
CVSS v4: 8.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-116689
CWE-ID: CWE-201
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to disclose custom credential header values, potentially exposing API keys or service tokens.
The vulnerability exists due to realm-dependent array validation in the sensitiveHeaders handling in follow-redirects index.js when processing a caller-supplied array created in another JavaScript realm. A remote attacker can return a cross-origin redirect from an attacker-controlled or compromised endpoint to receive custom credentials because the instanceof Array check rejects the cross-realm array and replaces the caller's sensitive-header list with an empty list.
Built-in protections for Authorization, Proxy-Authorization, and Cookie headers remain effective.
Affected software
follow-redirects
How to mitigate CVE-2026-116689
Install security update from vendor's website.
follow-redirects - update to 1.16.2