Vulnerabilities in pkg:npm/blamer

PACKAGE
Advisory Identifier: GHSA-6f9p-g466-f8v8
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Advisory Summary

CVE-2023-26143 is a MODERATE (CVSS 6.5) blamer vulnerable to arbitrary argument vulnerability (CWE-88: Improper Neutralization of Argument Delimiters in a Command ('Argument Injection')) affecting Blamer libraries in the npm ecosystem. The issue involves blamer vulnerable to arbitrary argument injection via the blamebyfile() api. Remediation is available by upgrading affected packages to version 1.0.4.

3 Known Advisory Record(s)
Package Vulnerability Intelligence

pkg:npm/blamer

3 Known Advisory Record(s)

Vulnerability advisories affecting package pkg:npm/blamer. Select an advisory below to view technical details or fixes.

Advisory ID CVE / NVD Severity Summary
GHSA-6f9p-g466-f8v8 CVE-2023-26143 MODERATE blamer vulnerable to Arbitrary Argument Injection via the blameByFile() API
GHSA-8cxp-cjm8-fj36 CVE-2019-10807 CRITICAL Improper Neutralization of Special Elements used in an OS Command in Blamer
GHSA-7vm7-j8p7-h346 CVE-2020-8137 HIGH Code injection in blamer

CVE-2023-26143 at a Glance

CVE Identifier CVE-2023-26143
GHSA Identifier GHSA-6f9p-g466-f8v8
Severity MODERATE
CVSS v3.1 Base Score 6.5
CWE Classification CWE-88: Improper Neutralization of Argument Delimiters in a Command ('Argument Injection')
Affected Product Blamer
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:N/I:L/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 Low (I:L)
Availability Low (A:L)

How to Fix CVE-2023-26143

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

blamer fixed: 1.0.4 
npm install blamer@1.0.4
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 blamer

How to Check if You Are Affected

To determine whether your Node.js application is affected by CVE-2023-26143, inspect your project dependencies using npm:

npm ls blamer

Analyze the terminal output to locate any version of Blamer in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.0.4), your application is affected.

Note: The npm ls blamer 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-88: Improper Neutralization of Argument Delimiters in a Command ('Argument Injection'), where the product constructs a string for a command to be executed by a separate component in another control sphere, but it does not properly delimit the intended arguments, options, or switches within that command string. In Blamer, 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

Versions of the blamer package before 1.0.4 are vulnerable to Arbitrary Argument Injection via the blameByFile() API. The library does not sanitize for user input or validate the given file path conforms to a specific schema, nor does it properly pass command-line flags to the git binary using the double-dash POSIX characters (--) to communicate the end of options.

CVE-2023-26143 Affected Blamer Versions

1 component(s)
Fixed Versions:
1.0.4
Product / Package Ecosystem Affected Versions Fixed Version
blamer
npm/blamer
npm
< 1.0.4
1.0.4

References

NVD — CVE-2023-26143 NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-26143
Security Fix Commit FIX COMMIT
https://github.com/kucherenko/blamer/commit/0965877f115753371a2570f10a63c455d2b2cde3
Blamer Source Repository REPOSITORY
https://gist.github.com/lirantal/14c3686370a86461f555d3f0703e02f9
Blamer Source Repository REPOSITORY
https://github.com/kucherenko/blamer
Blamer Security Information SECURITY
https://security.snyk.io/vuln/SNYK-JS-BLAMER-5731318

Frequently Asked Questions

What is CVE-2023-26143?
CVE-2023-26143 is a security vulnerability in Blamer involving blamer vulnerable to Arbitrary Argument Injection via the blameByFile() API under CWE-88: Improper Neutralization of Argument Delimiters in a Command ('Argument Injection').
Which Blamer versions are affected?
Affected versions include releases prior to 1.0.4 across affected packages: blamer.
What version fixes CVE-2023-26143?
Upgrading to 1.0.4 (or the latest patched release for your respective branch) resolves the vulnerability.
Is blamer affected?
Yes, blamer is affected in releases prior to 1.0.4. Upgrade your dependency to 1.0.4 or later.
What is the CVSS score of CVE-2023-26143?
CVE-2023-26143 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:N/I:L/A:L.
What CWE is associated with CVE-2023-26143?
CVE-2023-26143 is classified under CWE-88: Improper Neutralization of Argument Delimiters in a Command ('Argument Injection') (The product constructs a string for a command to be executed by a separate component in another control sphere, but it does not properly delimit the intended arguments, options, or switches within that command string.).
How can I check npm dependencies for CVE-2023-26143?
Run the dependency tree command: 'npm ls blamer'. 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-6f9p-g466-f8v8",
  "modified" : "2025-09-26T21:40:42Z",
  "published" : "2023-09-19T06:30:17Z",
  "aliases" : [ "CVE-2023-26143" ],
  "summary" : " blamer vulnerable to Arbitrary Argument Injection via the blameByFile() API",
  "details" : "Versions of the blamer package before 1.0.4 are vulnerable to Arbitrary Argument Injection via the blameByFile() API. The library does not sanitize for user input or validate the given file path conforms to a specific schema, nor does it properly pass command-line flags to the git binary using the double-dash POSIX characters (--) to communicate the end of options.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "blamer"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "1.0.4"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2023-26143"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/kucherenko/blamer/commit/0965877f115753371a2570f10a63c455d2b2cde3"
  }, {
    "type" : "WEB",
    "url" : "https://gist.github.com/lirantal/14c3686370a86461f555d3f0703e02f9"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/kucherenko/blamer"
  }, {
    "type" : "WEB",
    "url" : "https://security.snyk.io/vuln/SNYK-JS-BLAMER-5731318"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-88" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2023-09-21T17:07:40Z",
    "nvd_published_at" : "2023-09-19T05:17:10Z"
  }
}