Vulnerabilities in pkg:pypi/num2words

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Advisory Summary

GHSA-jxr6-qrxx-2ph2 is a CRITICAL num2words subjected to phishing attack, vulnerability (CWE-506: Embedded Malicious Code) affecting Num2words libraries in the PyPI ecosystem. The issue involves num2words subjected to phishing attack, two versions published containing malware. Remediation is available in the latest vendor maintenance releases.

1 Known Advisory Record(s)
Package Vulnerability Intelligence

pkg:pypi/num2words

1 Known Advisory Record(s)

Vulnerability advisories affecting package pkg:pypi/num2words. Select an advisory below to view technical details or fixes.

Advisory ID CVE / NVD Severity Summary
GHSA-jxr6-qrxx-2ph2 - CRITICAL num2words subjected to phishing attack, two versions published containing malware

GHSA-jxr6-qrxx-2ph2 at a Glance

CVE Identifier N/A
GHSA Identifier GHSA-jxr6-qrxx-2ph2
Severity CRITICAL
CVSS v3.1 Base Score N/A
CWE Classification CWE-506: Embedded Malicious Code
Affected Product Num2words
Package Ecosystem PyPI
Published Date
Last Updated

How to Fix GHSA-jxr6-qrxx-2ph2

To remediate this vulnerability, upgrade all affected Num2words dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

num2words fixed: Latest secure release 
pip install num2words>=Latest secure release
num2words fixed: Latest secure release 
pip install num2words>=Latest secure release
num2words fixed: Latest secure release 
pip install num2words>=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: 

pip show num2words

How to Check if You Are Affected

To determine whether your Python environment is affected by GHSA-jxr6-qrxx-2ph2, inspect your installed packages using pip:

pip show num2words

Analyze the terminal output to locate any version of Num2words 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 pip show num2words command checks currently installed packages in your active Python environment.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-506: Embedded Malicious Code, where the product contains code that appears to be malicious in nature. In Num2words, 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

The `num2words` project was compromised via a phishing attack and two new versions were uploaded to PyPI containing malicious code. The affected versions have been removed from PyPI, and users are advised to remove the affected versions from their environments.

GHSA-jxr6-qrxx-2ph2 Affected Num2words Versions

3 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
num2words
pypi/num2words
PyPI
≥ 0.5.15
≤ 0.5.16
num2words
pypi/num2words
PyPI
0.5.15
All 1 versions
0.5.15
None specified
num2words
pypi/num2words
PyPI
0.5.16
All 1 versions
0.5.16
None specified

References

Num2words Source Repository REPOSITORY
https://github.com/ossf/malicious-packages/blob/49d0cfba3689ed9b195d101d3a2a964c6a77f767/osv/malicious/pypi/num2words/MAL-2025-6794.json
Num2words Source Repository REPOSITORY
https://github.com/pypa/advisory-database/tree/main/vulns/num2words/PYSEC-2025-72.yaml
Num2words Source Repository REPOSITORY
https://github.com/savoirfairelinux/num2words
nitter.tiekoetter.com/sflinux/status/1949... WEB
https://nitter.tiekoetter.com/SFLinux/status/1949906299308953827
Num2words Security Information SECURITY
https://www.stepsecurity.io/blog/supply-chain-security-alert-num2words-pypi-package-shows-signs-of-compromise

Frequently Asked Questions

What is GHSA-jxr6-qrxx-2ph2?
GHSA-jxr6-qrxx-2ph2 is a security vulnerability in Num2words involving num2words subjected to phishing attack, two versions published containing malware under CWE-506: Embedded Malicious Code.
Which Num2words versions are affected?
Affected versions include releases prior to current release patches across affected packages: num2words.
What version fixes GHSA-jxr6-qrxx-2ph2?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is num2words affected?
Yes, num2words is affected in releases prior to Latest secure release. Upgrade your dependency to Latest secure release or later.
What CWE is associated with GHSA-jxr6-qrxx-2ph2?
GHSA-jxr6-qrxx-2ph2 is classified under CWE-506: Embedded Malicious Code (The product contains code that appears to be malicious in nature.).
How can I check PyPI dependencies for GHSA-jxr6-qrxx-2ph2?
Run the dependency tree command: 'pip show num2words'. 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-jxr6-qrxx-2ph2",
  "modified" : "2026-07-21T17:20:12Z",
  "published" : "2025-07-31T19:33:29Z",
  "aliases" : [ ],
  "summary" : "num2words subjected to phishing attack, two versions published containing malware",
  "details" : "The `num2words` project was compromised via a phishing attack and two new versions were uploaded to PyPI containing malicious code. The affected versions have been removed from PyPI, and users are advised to remove the affected versions from their environments.",
  "severity" : [ {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "num2words"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0.5.15"
      }, {
        "last_affected" : "0.5.16"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "num2words"
    },
    "versions" : [ "0.5.15" ]
  }, {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "num2words"
    },
    "versions" : [ "0.5.16" ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/ossf/malicious-packages/blob/49d0cfba3689ed9b195d101d3a2a964c6a77f767/osv/malicious/pypi/num2words/MAL-2025-6794.json"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/pypa/advisory-database/tree/main/vulns/num2words/PYSEC-2025-72.yaml"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/savoirfairelinux/num2words"
  }, {
    "type" : "WEB",
    "url" : "https://nitter.tiekoetter.com/SFLinux/status/1949906299308953827"
  }, {
    "type" : "WEB",
    "url" : "https://www.stepsecurity.io/blog/supply-chain-security-alert-num2words-pypi-package-shows-signs-of-compromise"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-506" ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2025-07-31T19:33:29Z",
    "nvd_published_at" : null
  }
}