follow-redirects: Cross-realm sensitiveHeaders arrays are discarded and custom credentials can follow redirects

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-116689
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-27 20:17:14 UTC
Updated2026-10-28 15:24:56 UTC
Descriptionfollow-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.

Risk And Classification

Primary CVSS: v3.1 5.9 MEDIUM from [email protected]

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

Problem Types: CWE-201 | CWE-201 CWE-201: Insertion of Sensitive Information Into Sent Data

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary5.9MEDIUMCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
3.1CNADECLARED5.9MEDIUMCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Follow-redirects Follow-redirects affected >= 1.16.0, < 1.16.2 Not specified

References

ReferenceSourceLinkTags
github.com/follow-redirects/follow-redirects/security/advisories/GHSA-mr... [email protected] github.com
github.com/follow-redirects/follow-redirects/releases/tag/v1.16.2 [email protected] github.com
github.com/follow-redirects/follow-redirects/commit/b0a7751e9cd64cd8eeb6... [email protected] github.com
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