CVE-2026-1245: Binary parser Binary-parser Library Has A Code Vulnerability

MODERATE
Advisory Identifier: GHSA-m39p-34qh-rh3w
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CVSS 6.5
CWE-94
Published
Advisory Summary

CVE-2026-1245 is a MODERATE (CVSS 6.5) binary-parser library has a code vulnerability (CWE-94: Improper Control of Generation of Code ('Code Injection')) affecting Binary parser libraries in the npm ecosystem. The issue involves binary-parser library has a code injection vulnerability. Remediation is available by upgrading affected packages to version 2.3.0.

CVE-2026-1245 at a Glance

CVE Identifier CVE-2026-1245
GHSA Identifier GHSA-m39p-34qh-rh3w
Severity MODERATE
CVSS v3.1 Base Score 6.5
CWE Classification CWE-94: Improper Control of Generation of Code ('Code Injection')
Affected Product Binary parser
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 CVE-2026-1245

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

binary-parser fixed: 2.3.0 
npm install binary-parser@2.3.0
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 binary-parser

How to Check if You Are Affected

To determine whether your Node.js application is affected by CVE-2026-1245, inspect your project dependencies using npm:

npm ls binary-parser

Analyze the terminal output to locate any version of Binary parser in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 2.3.0), your application is affected.

Note: The npm ls binary-parser 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-94: Improper Control of Generation of Code ('Code Injection'), where the product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment. In Binary parser, 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

A code injection vulnerability in the binary-parser library prior to version 2.3.0 allows arbitrary JavaScript code execution when untrusted values are used in parser field names or encoding parameters. The library directly interpolates these values into dynamically generated code without sanitization, enabling attackers to execute arbitrary code in the context of the Node.js process.

CVE-2026-1245 Affected Binary parser Versions

1 component(s)
Fixed Versions:
2.3.0
Product / Package Ecosystem Affected Versions Fixed Version
binary-parser
npm/binary-parser
npm
< 2.3.0
2.3.0

References

NVD — CVE-2026-1245 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-1245
Binary parser Source Repository REPOSITORY
https://github.com/keichi/binary-parser/pull/283
Binary parser Source Repository REPOSITORY
https://github.com/keichi/binary-parser
kb.cert.org/vuls/id/102648 WEB
https://kb.cert.org/vuls/id/102648
CVE Official Record — CVE-2026-1245 CVE
https://www.cve.org/CVERecord?id=CVE-2026-1245
www.kb.cert.org/vuls/id/102648 WEB
https://www.kb.cert.org/vuls/id/102648
www.npmjs.com/package/binary-pars... WEB
https://www.npmjs.com/package/binary-parser

Frequently Asked Questions

What is CVE-2026-1245?
CVE-2026-1245 is a security vulnerability in Binary parser involving binary-parser library has a code injection vulnerability under CWE-94: Improper Control of Generation of Code ('Code Injection').
Which Binary parser versions are affected?
Affected versions include releases prior to 2.3.0 across affected packages: binary-parser.
What version fixes CVE-2026-1245?
Upgrading to 2.3.0 (or the latest patched release for your respective branch) resolves the vulnerability.
Is binary-parser affected?
Yes, binary-parser is affected in releases prior to 2.3.0. Upgrade your dependency to 2.3.0 or later.
What is the CVSS score of CVE-2026-1245?
CVE-2026-1245 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 CVE-2026-1245?
CVE-2026-1245 is classified under CWE-94: Improper Control of Generation of Code ('Code Injection') (The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment.).
How can I check npm dependencies for CVE-2026-1245?
Run the dependency tree command: 'npm ls binary-parser'. 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-m39p-34qh-rh3w",
  "modified" : "2026-01-21T22:57:47Z",
  "published" : "2026-01-20T21:31:34Z",
  "aliases" : [ "CVE-2026-1245" ],
  "summary" : "binary-parser library has a code injection vulnerability",
  "details" : "A code injection vulnerability in the binary-parser library prior to version 2.3.0 allows arbitrary JavaScript code execution when untrusted values are used in parser field names or encoding parameters. The library directly interpolates these values into dynamically generated code without sanitization, enabling attackers to execute arbitrary code in the context of the Node.js process.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "binary-parser"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "2.3.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-1245"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/keichi/binary-parser/pull/283"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/keichi/binary-parser"
  }, {
    "type" : "WEB",
    "url" : "https://kb.cert.org/vuls/id/102648"
  }, {
    "type" : "WEB",
    "url" : "https://www.cve.org/CVERecord?id=CVE-2026-1245"
  }, {
    "type" : "WEB",
    "url" : "https://www.kb.cert.org/vuls/id/102648"
  }, {
    "type" : "WEB",
    "url" : "https://www.npmjs.com/package/binary-parser"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-94" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-01-21T22:57:47Z",
    "nvd_published_at" : "2026-01-20T19:15:50Z"
  }
}