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CVE-2026-40895

follow-redirects: Custom Authentication Headers Leaked to Cross-Domain Redirect Targets

Published: Apr 21, 2026Updated: Apr 23, 2026 Sources: CVE List NVDCWE-200
NVD MITRE
7.5CVSSHIGH
EPSS Score
0.3%
Top 79.0%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Workaround Only

Description

follow-redirects is an open source, drop-in replacement for Node's `http` and `https` modules that automatically follows redirects. Prior to 1.16.0, when an HTTP request follows a cross-domain redirect (301/302/307/308), follow-redirects only strips authorization, proxy-authorization, and cookie headers (matched by regex at index.js). Any custom authentication header (e.g., X-API-Key, X-Auth-Token, Api-Key, Token) is forwarded verbatim to the redirect target. This vulnerability is fixed in 1.16.0.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:HI:NA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:NIntegrity
None
A:NAvailability
None
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Weaknesses

CWE-200NVD-CWE-noinfo

Affected Products

follow-redirectsfollow-redirects
Library
OSS Libraries / npm
follow-redirectsfollow-redirects project
Library
OSS Libraries / generic-library
follow-redirectsoss-projectOSS Librariesaka follow-redirect
follow-redirects projectoss-projectOSS Librariesaka follow-redirects

Attack Graph

Products CVE Techniques Tactics

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Exploitability

Workaround Available

MITRE ATT&CK

1 technique
Collection
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References

https://github.com/follow-redirects/follow-redirects/security/advisories/GHSA-r4q5-vmmm-2653
github.com

Timeline

Published
Apr 21, 2026
Last Updated
Apr 23, 2026

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