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Public proof of conceptFix available

CVE-2026-116689

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

A public proof of concept exists; no exploitation attested.

  • Published2026-10-27
  • Fixed in1.16.2
  • WeaknessCWE-201

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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.

Timeline

dates in UTC
  1. 2026-10-2720:17CVE publishedNVD

Versions per branch

OSV
follow-redirects
BranchAffectedFixed in
1.16≥ 1.16.0, < 1.16.21.16.2

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Products declared by the CNA1 product

As GitHub_M, the CNA that assigned this CVE, declared them in the CVE record; versions as written.

  • follow-redirects
    Affected
    • = >= 1.16.0, < 1.16.2no fix stated

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2026-10-27

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • @rootio/follow-redirectsRoot:npmall versions · fixed in 1.16.0-root.io.2
  • @rootio/follow-redirectsRoot:npmall versions · fixed in 1.16.1-root.io.1
  • agama-web-uiopenSUSE:Tumbleweedall versions · fixed in 25+475.275dd4727-56.1
  • arangodb-3.11Chainguardall versions · fixed in 3.11.14.6-r4
  • argo-workflows-ui-3.6MinimOSall versions · no fixed version listedand 5 other packages
  • azuriteChainguardall versions · fixed in 3.37.0-r12
  • code-serverWolfiall versions · fixed in 4.144.0-r1
  • code-serverChainguardall versions · fixed in 4.144.0-r1

48 more package ranges on OSV.dev

Vendor advisories

  • CVE-2026-116689 Red Hat Product Security14 products fixed · 1 known affected

    follow-redirects: follow-redirects: Information disclosure via cross-origin redirects

    prometheus3.5.src as a component of Red Hat Hardened Images

  • RHSA-2026:94794 Red Hat Product Security4 products fixed

    Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update

  • RHSA-2026:93608 Red Hat Product Security4 products fixed

    Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update

  • RHSA-2026:93605 Red Hat Product Security3 products fixed

    Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update

  • RHSA-2026:93601 Red Hat Product Security3 products fixed

    Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update

Full record on NVD

Fix

  1. Update follow-redirects to 1.16.2
  2. Vendor fix Red Hat Product Security RHSA-2026:94794 · 4 productsFor details on how to apply this update, which includes the changes described in this advisory, refer to: https://images.redhat.com/
  3. No fix planned, says the vendor Red Hat Product Security CVE-2026-116689 · 1 productWill not fix

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Published
2026-10-27
Last Modified
2026-10-30
NVD status
Deferred
GitHub Advisory
GHSA-mrwp-f3q8-3g9p

Frequently asked questions

What is CVE-2026-116689?

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.

Is CVE-2026-116689 actively exploited?

A proof-of-concept exploit exists for CVE-2026-116689, but active exploitation has not been confirmed at this time.

What is the CVSS score for CVE-2026-116689?

CVE-2026-116689 has a CVSS v3 base score of 5.9 (MEDIUM severity), with vector string CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N.

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Sources for this record