GHSA-55cm-p4ww-685g: Duplicate Advisory Hono Missing Validation Of Cookie Vulnerability

MODERATE
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CVSS 5.3
CWE-113 CWE-20
Published
Advisory Summary

GHSA-55cm-p4ww-685g is a MODERATE (CVSS 5.3) hono missing validation of cookie 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 missing validation of cookie name on write path in setcookie(). Remediation is available by upgrading affected packages to version 4.12.12.

GHSA-55cm-p4ww-685g at a Glance

CVE Identifier N/A
GHSA Identifier GHSA-55cm-p4ww-685g
Severity MODERATE
CVSS v3.1 Base Score 5.3
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: 5.3

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:N/I:N/A:L).

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 None (C:N)
Integrity None (I:N)
Availability Low (A:L)

How to Fix GHSA-55cm-p4ww-685g

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: 4.12.12 
npm install hono@4.12.12
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-55cm-p4ww-685g, 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 4.12.12), 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-26pp-8wgv-hjvm. This link is maintained to preserve external references. ### Original Description Hono before 4.12.12 does not validate cookie names on the write path in the setCookie(), serialize(), and serializeSigned() functions, allowing invalid characters such as control characters (e.g. \r or \n) when an application passes a user-controlled cookie name. This can produce malformed Set-Cookie header values. In modern runtimes such as Node.js and Cloudflare Workers, such invalid header values are rejected and cause a runtime error before the response is sent, so header injection or response splitting could not be reproduced; the issue primarily affects correctness and robustness, resulting in runtime errors (availability) rather than confirmed header injection.

GHSA-55cm-p4ww-685g Affected Duplicate Advisory Versions

1 component(s)
Fixed Versions:
4.12.12
Product / Package Ecosystem Affected Versions Fixed Version
hono
npm/hono
npm
< 4.12.12
4.12.12

References

GitHub Advisory / Wiki ADVISORY
https://github.com/honojs/hono/security/advisories/GHSA-26pp-8wgv-hjvm
NVD — GHSA-55cm-p4ww-685g NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-56762
www.vulncheck.com/advisories/hono-mis... WEB
https://www.vulncheck.com/advisories/hono-missing-cookie-name-validation-in-setcookie

Frequently Asked Questions

What is GHSA-55cm-p4ww-685g?
GHSA-55cm-p4ww-685g is a security vulnerability in Duplicate Advisory involving Hono missing validation of cookie name on write path in setCookie() 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 4.12.12 across affected packages: hono.
What version fixes GHSA-55cm-p4ww-685g?
Upgrading to 4.12.12 (or the latest patched release for your respective branch) resolves the vulnerability.
Is hono affected?
Yes, hono is affected in releases prior to 4.12.12. Upgrade your dependency to 4.12.12 or later.
What is the CVSS score of GHSA-55cm-p4ww-685g?
GHSA-55cm-p4ww-685g has a CVSS v3.1 base score of 5.3 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.
What CWE is associated with GHSA-55cm-p4ww-685g?
GHSA-55cm-p4ww-685g 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-55cm-p4ww-685g?
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-55cm-p4ww-685g",
  "modified" : "2026-09-24T18:24:42Z",
  "published" : "2026-06-23T15:32:37Z",
  "withdrawn" : "2026-09-24T18:24:42Z",
  "aliases" : [ ],
  "summary" : "Duplicate Advisory: Hono missing validation of cookie name on write path in setCookie()",
  "details" : "### Duplicate Advisory\nThis advisory has been withdrawn because it is a duplicate of GHSA-26pp-8wgv-hjvm. This link is maintained to preserve external references.\n\n### Original Description\nHono before 4.12.12 does not validate cookie names on the write path in the setCookie(), serialize(), and serializeSigned() functions, allowing invalid characters such as control characters (e.g. \\r or \\n) when an application passes a user-controlled cookie name. This can produce malformed Set-Cookie header values. In modern runtimes such as Node.js and Cloudflare Workers, such invalid header values are rejected and cause a runtime error before the response is sent, so header injection or response splitting could not be reproduced; the issue primarily affects correctness and robustness, resulting in runtime errors (availability) rather than confirmed header injection.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"
  }, {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/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"
      }, {
        "fixed" : "4.12.12"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/honojs/hono/security/advisories/GHSA-26pp-8wgv-hjvm"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-56762"
  }, {
    "type" : "WEB",
    "url" : "https://www.vulncheck.com/advisories/hono-missing-cookie-name-validation-in-setcookie"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-113", "CWE-20" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-09-24T18:24:42Z",
    "nvd_published_at" : "2026-06-23T13:16:46Z"
  }
}