SB2026110477 - Insertion of Sensitive Information Into Sent Data in follow-redirects

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Main Vulnerability Database SB2026110477

SB2026110477 - Insertion of Sensitive Information Into Sent Data in follow-redirects

Published: November 4, 2026

Security Bulletin ID SB2026110477
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Information disclosure

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Insertion of Sensitive Information Into Sent Data (CVE-ID: CVE-2026-116689)

CWE-ID: CWE-201 - Insertion of Sensitive Information Into Sent Data

CVSSv4: 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]


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.


Remediation

Install update from vendor's website.

References