Vulnerability in Follow-Redirects
CVE-2026-116689
follow-redirects is a Node.js HTTP and HTTPS client wrapper that automatically follows redirects. From 1.16.0 until 1.16.2, the documented sensitiveHeaders option is checked with value instanceof Array, so an array created in another JavaScript realm is replaced with an empty list even though Array.isArray recognizes it. When a request then follows an attacker-controlled cross-origin redirect, a custom credential header named in that discarded list can be forwarded to the redirect destination. This issue is fixed in version 1.16.2.
Published .
CVSS v3 metric
CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
- Follow-Redirects — versions >= 1.16.0, < 1.16.2
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-116689?
- CVE-2026-116689 is a medium-severity vulnerability in Follow-Redirects, classified under Insertion of Sensitive Information into Sent Data. CVSS score: 5.9/10. Published 2026-10-27.
- How severe is CVE-2026-116689?
- Medium severity. CVSS v3 base score is 5.9 out of 10.