CVE-2026-116689 follow-redirects: Cross-realm sensitiveHeaders arrays are discarded and custom credentials can follow redirects
- Exploited in the wild
- Not known
- Fix
- None listed
What is CVE-2026-116689?
CVE-2026-116689 is a medium-severity vulnerability in follow-redirects, published on 27 Oct 2026.
Official description
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.
Weakness: CWE-201
Which versions are affected by CVE-2026-116689?
How do I fix CVE-2026-116689?
No fix has been published for CVE-2026-116689 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-116689 being exploited?
There is no known exploitation of CVE-2026-116689 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-116689, GHSA-mrwp-f3q8-3g9p, UBUNTU-CVE-2026-116689.