Medium 6.9Published Apr 21, 2026

CVE-2026-40895follow-redirects: Custom Authentication Headers Leaked to Cross-Domain Redirect Targets

Updated under an hour ago (Oct 28, 2026, 12:23 AM ET)

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It affects follow-redirects and 47 other products. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for follow-redirects

Exploited in the last 30 days

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: 6.9 MEDIUM (v4.0, CNA)CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
Weakness (CWE): CWE-200, CWE-212
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Modified
Record last updated: Sep 10, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

follow-redirects follow-redirects follow_redirects:follow_redirects (from the name)	before 1.16.0	CNA record
Red Hat Cryostat 4 on RHEL 9 redhat:cryostat	from 4.2.0-9 not affected	CISA ADP
Red Hat Cluster Observability Operator 1.5.0 redhat:cluster_observability_operator	from 1781116645 not affected	CISA ADP
Red Hat multicluster engine for Kubernetes 2.1 redhat:multicluster_engine	from 1780917531 not affected	CISA ADP
Red Hat Network Observability (NETOBSERV) 1.11.0 redhat:network_observ_optr	from 1778508956 not affected	CISA ADP
Red Hat Red Hat Advanced Cluster Management for Kubernetes 2.14 redhat:acm	from 1783451729 not affected	CISA ADP
Red Hat Red Hat Advanced Cluster Security 4.9 redhat:advanced_cluster_security	from 1779371594 not affected	CISA ADP
Red Hat Red Hat Ansible Automation Platform 2.5 redhat:ansible_automation_platform	from 1780082949 not affected	CISA ADP
Red Hat Red Hat Developer Hub 1.8 redhat:rhdh	from 1779841586 not affected	CISA ADP
Red Hat Red Hat Discovery 2 redhat:discovery	from 1778156756 not affected	CISA ADP
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References

References

https://github.com/follow-redirects/follow-redirects/security/advisories/GHSA-r4q5-vmmm-2653	x-refsource-confirm, mitigation, vendor-advisory
https://access.redhat.com/errata/RHSA-2026:13826
https://access.redhat.com/errata/RHSA-2026:14937
https://access.redhat.com/errata/RHSA-2026:16476
https://access.redhat.com/errata/RHSA-2026:16532
https://access.redhat.com/errata/RHSA-2026:16534
https://access.redhat.com/errata/RHSA-2026:16535
https://access.redhat.com/errata/RHSA-2026:16542
https://access.redhat.com/errata/RHSA-2026:16874
https://access.redhat.com/errata/RHSA-2026:17657
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The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.