GHSA-cw3j-28qq-x3xh: Duplicate Advisory Hono Vulnerable To Vary Header Vulnerability

MODERATE
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CVSS 6.5
CWE-113
Published
Advisory Summary

GHSA-cw3j-28qq-x3xh is a MODERATE (CVSS 6.5) hono vulnerable to vary header vulnerability (CWE-113: Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Request/Response Splitting')) affecting Duplicate Advisory libraries in the npm ecosystem. The issue involves hono vulnerable to vary header injection leading to potential cors bypass. Remediation is available in the latest vendor maintenance releases.

GHSA-cw3j-28qq-x3xh at a Glance

CVE Identifier N/A
GHSA Identifier GHSA-cw3j-28qq-x3xh
Severity MODERATE
CVSS v3.1 Base Score 6.5
CWE Classification CWE-113: Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Request/Response Splitting')
Affected Product Duplicate Advisory
Package Ecosystem npm
Published Date
Last Updated

Security Impact

CVSS: 6.5

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality Low (C:L)
Integrity Low (I:L)
Availability None (A:N)

How to Fix GHSA-cw3j-28qq-x3xh

To remediate this vulnerability, upgrade all affected Duplicate Advisory dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

hono fixed: Latest secure release 
npm install hono@Latest secure release
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

npm ls hono

How to Check if You Are Affected

To determine whether your Node.js application is affected by GHSA-cw3j-28qq-x3xh, inspect your project dependencies using npm:

npm ls hono

Analyze the terminal output to locate any version of Duplicate Advisory in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than the patched release), your application is affected.

Note: The npm ls hono command inspects dependencies declared in your package.json and lockfile; it does not perform automated runtime dynamic scanning.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-113: Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Request/Response Splitting'), where the product receives data from an http agent/component (e.g., web server, proxy, browser, etc.), but it does not neutralize or incorrectly neutralizes cr and lf characters before the data is included in outgoing http headers. In Duplicate Advisory, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

## Duplicate Advisory This advisory has been withdrawn because it is a duplicate of GHSA-q7jf-gf43-6x6p. This link is maintained to preserve external references. ## Original Description Hono before 4.10.2 (fixed in 4.10.3) contains a flaw in its CORS middleware: when the origin is not set to "*", the middleware copies the Vary header from the incoming request into the response. Because Vary is a response header that should be managed by the server, an attacker can supply arbitrary Vary values that are reflected into the response, potentially causing cache key pollution and inconsistent CORS enforcement in environments that rely on shared caches or proxies.

GHSA-cw3j-28qq-x3xh Affected Duplicate Advisory Versions

1 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
hono
npm/hono
npm

References

GitHub Advisory / Wiki ADVISORY
https://github.com/honojs/hono/security/advisories/GHSA-q7jf-gf43-6x6p
NVD — GHSA-cw3j-28qq-x3xh NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-71381
www.vulncheck.com/advisories/hono-var... WEB
https://www.vulncheck.com/advisories/hono-vary-header-injection-in-cors-middleware

Frequently Asked Questions

What is GHSA-cw3j-28qq-x3xh?
GHSA-cw3j-28qq-x3xh is a security vulnerability in Duplicate Advisory involving Hono vulnerable to Vary Header Injection leading to potential CORS Bypass under CWE-113: Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Request/Response Splitting').
Which Duplicate Advisory versions are affected?
Affected versions include releases prior to current release patches across affected packages: hono.
What version fixes GHSA-cw3j-28qq-x3xh?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is hono affected?
Yes, hono is affected in releases prior to Latest secure release. Upgrade your dependency to Latest secure release or later.
What is the CVSS score of GHSA-cw3j-28qq-x3xh?
GHSA-cw3j-28qq-x3xh has a CVSS v3.1 base score of 6.5 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N.
What CWE is associated with GHSA-cw3j-28qq-x3xh?
GHSA-cw3j-28qq-x3xh is classified under CWE-113: Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Request/Response Splitting') (The product receives data from an HTTP agent/component (e.g., web server, proxy, browser, etc.), but it does not neutralize or incorrectly neutralizes CR and LF characters before the data is included in outgoing HTTP headers.).
How can I check npm dependencies for GHSA-cw3j-28qq-x3xh?
Run the dependency tree command: 'npm ls hono'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-cw3j-28qq-x3xh",
  "modified" : "2026-10-02T18:28:39Z",
  "published" : "2026-07-01T00:34:02Z",
  "withdrawn" : "2026-10-02T18:28:39Z",
  "aliases" : [ ],
  "summary" : "Duplicate Advisory: Hono vulnerable to Vary Header Injection leading to potential CORS Bypass",
  "details" : "## Duplicate Advisory\n\nThis advisory has been withdrawn because it is a duplicate of GHSA-q7jf-gf43-6x6p. This link is maintained to preserve external references.\n\n## Original Description\nHono before 4.10.2 (fixed in 4.10.3) contains a flaw in its CORS middleware: when the origin is not set to \"*\", the middleware copies the Vary header from the incoming request into the response. Because Vary is a response header that should be managed by the server, an attacker can supply arbitrary Vary values that are reflected into the response, potentially causing cache key pollution and inconsistent CORS enforcement in environments that rely on shared caches or proxies.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N"
  }, {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "hono"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "< 4.10.3"
    }
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/honojs/hono/security/advisories/GHSA-q7jf-gf43-6x6p"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2025-71381"
  }, {
    "type" : "WEB",
    "url" : "https://www.vulncheck.com/advisories/hono-vary-header-injection-in-cors-middleware"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-113" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-10-02T18:28:39Z",
    "nvd_published_at" : "2026-06-30T23:16:52Z"
  }
}