Vulnerabilities in pkg:npm/knwl.js

PACKAGE
Advisory Identifier: GHSA-68qg-g787-3rp5
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Advisory Summary

CVE-2020-26306 is a MODERATE denial of service vulnerability (CWE-1333: Inefficient Regular Expression Complexity) affecting Knwl.js libraries in the npm ecosystem. The issue involves knwl.js regular expression denial of service vulnerability. Remediation is available in the latest vendor maintenance releases.

1 Known Advisory Record(s)
Package Vulnerability Intelligence

pkg:npm/knwl.js

1 Known Advisory Record(s)

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

Advisory ID CVE / NVD Severity Summary
GHSA-68qg-g787-3rp5 CVE-2020-26306 MODERATE Knwl.js Regular Expression Denial of Service vulnerability

CVE-2020-26306 at a Glance

CVE Identifier CVE-2020-26306
GHSA Identifier GHSA-68qg-g787-3rp5
Severity MODERATE
CVSS v3.1 Base Score N/A
CWE Classification CWE-1333: Inefficient Regular Expression Complexity
Affected Product Knwl.js
Package Ecosystem npm
Published Date
Last Updated

How to Fix CVE-2020-26306

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

knwl.js fixed: Latest secure release 
npm install knwl.js@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 knwl.js

How to Check if You Are Affected

To determine whether your Node.js application is affected by CVE-2020-26306, inspect your project dependencies using npm:

npm ls knwl.js

Analyze the terminal output to locate any version of Knwl.js 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 knwl.js 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-1333: Inefficient Regular Expression Complexity, where the product uses a regular expression with a worst-case computational complexity that is inefficient and possibly exponential. In Knwl.js, 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

Knwl.js is a Javascript library that parses through text for dates, times, phone numbers, emails, places, and more. Versions 1.0.2 and prior contain one or more regular expressions that are vulnerable to Regular Expression Denial of Service (ReDoS). As of time of publication, no known patches are available.

CVE-2020-26306 Affected Knwl.js Versions

1 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
knwl.js
npm/knwl.js
npm
≤ 1.0.2

References

NVD — CVE-2020-26306 NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-26306
Knwl.js Source Repository REPOSITORY
https://github.com/benhmoore/Knwl/issues/106
Security Fix Commit FIX COMMIT
https://github.com/benhmoore/Knwl/commit/88aa966b1415a167c7c91b70053b72c7762c1cc0
Knwl.js Source Repository REPOSITORY
https://github.com/benhmoore/Knwl
GitHub Advisory / Wiki ADVISORY
https://securitylab.github.com/advisories/GHSL-2020-296-redos-Knwl.js

Frequently Asked Questions

What is CVE-2020-26306?
CVE-2020-26306 is a security vulnerability in Knwl.js involving Knwl.js Regular Expression Denial of Service vulnerability under CWE-1333: Inefficient Regular Expression Complexity.
Which Knwl.js versions are affected?
Affected versions include releases prior to current release patches across affected packages: knwl.js.
What version fixes CVE-2020-26306?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is knwl.js affected?
Yes, knwl.js is affected in releases prior to Latest secure release. Upgrade your dependency to Latest secure release or later.
What CWE is associated with CVE-2020-26306?
CVE-2020-26306 is classified under CWE-1333: Inefficient Regular Expression Complexity (The product uses a regular expression with a worst-case computational complexity that is inefficient and possibly exponential.).
How can I check npm dependencies for CVE-2020-26306?
Run the dependency tree command: 'npm ls knwl.js'. 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-68qg-g787-3rp5",
  "modified" : "2024-10-28T14:50:17Z",
  "published" : "2024-10-26T21:30:46Z",
  "aliases" : [ "CVE-2020-26306" ],
  "summary" : "Knwl.js Regular Expression Denial of Service vulnerability",
  "details" : "Knwl.js is a Javascript library that parses through text for dates, times, phone numbers, emails, places, and more. Versions 1.0.2 and prior contain one or more regular expressions that are vulnerable to Regular Expression Denial of Service (ReDoS). As of time of publication, no known patches are available.",
  "severity" : [ {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "knwl.js"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "1.0.2"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2020-26306"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/benhmoore/Knwl/issues/106"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/benhmoore/Knwl/commit/88aa966b1415a167c7c91b70053b72c7762c1cc0"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/benhmoore/Knwl"
  }, {
    "type" : "ADVISORY",
    "url" : "https://securitylab.github.com/advisories/GHSL-2020-296-redos-Knwl.js"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-1333" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2024-10-28T14:50:17Z",
    "nvd_published_at" : "2024-10-26T21:15:13Z"
  }
}