CVE-2024-22363: Xlsx Denial of Service Vulnerability

HIGH
Advisory Identifier: GHSA-5pgg-2g8v-p4x9
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CVSS 7.5
CWE-1333
Published
Advisory Summary

CVE-2024-22363 is a HIGH (CVSS 7.5) denial of service vulnerability (CWE-1333: Inefficient Regular Expression Complexity) affecting Xlsx libraries in the npm ecosystem. The issue involves sheetjs regular expression denial of service (redos). Remediation is available in the latest vendor maintenance releases.

CVE-2024-22363 at a Glance

CVE Identifier CVE-2024-22363
GHSA Identifier GHSA-5pgg-2g8v-p4x9
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification CWE-1333: Inefficient Regular Expression Complexity
Affected Product Xlsx
Package Ecosystem npm
Published Date
Last Updated

Security Impact

CVSS: 7.5

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:N/A:H).

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 High (A:H)

How to Fix CVE-2024-22363

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

xlsx fixed: Latest secure release 
npm install xlsx@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 xlsx

How to Check if You Are Affected

To determine whether your Node.js application is affected by CVE-2024-22363, inspect your project dependencies using npm:

npm ls xlsx

Analyze the terminal output to locate any version of Xlsx 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 xlsx 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 Xlsx, 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

SheetJS Community Edition before 0.20.2 is vulnerable.to Regular Expression Denial of Service (ReDoS). A non-vulnerable version cannot be found via npm, as the repository hosted on GitHub and the npm package `xlsx` are no longer maintained. Version 0.20.2 can be downloaded via https://cdn.sheetjs.com/.

CVE-2024-22363 Affected Xlsx Versions

1 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
xlsx
npm/xlsx
npm

References

NVD — CVE-2024-22363 NVD
https://nvd.nist.gov/vuln/detail/CVE-2024-22363
cdn.sheetjs.com WEB
https://cdn.sheetjs.com
cdn.sheetjs.com/advisories/cve-2024... WEB
https://cdn.sheetjs.com/advisories/CVE-2024-22363
MITRE CVE Database — CVE-2024-22363 MITRE
https://cwe.mitre.org/data/definitions/1333.html
git.sheetjs.com/sheetjs/sheetjs PACKAGE
https://git.sheetjs.com/sheetjs/sheetjs
git.sheetjs.com/sheetjs/sheetjs/src... WEB
https://git.sheetjs.com/sheetjs/sheetjs/src/tag/v0.20.2

Frequently Asked Questions

What is CVE-2024-22363?
CVE-2024-22363 is a security vulnerability in Xlsx involving SheetJS Regular Expression Denial of Service (ReDoS) under CWE-1333: Inefficient Regular Expression Complexity.
Which Xlsx versions are affected?
Affected versions include releases prior to current release patches across affected packages: xlsx.
What version fixes CVE-2024-22363?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is xlsx affected?
Yes, xlsx is affected in releases prior to Latest secure release. Upgrade your dependency to Latest secure release or later.
What is the CVSS score of CVE-2024-22363?
CVE-2024-22363 has a CVSS v3.1 base score of 7.5 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
What CWE is associated with CVE-2024-22363?
CVE-2024-22363 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-2024-22363?
Run the dependency tree command: 'npm ls xlsx'. 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-5pgg-2g8v-p4x9",
  "modified" : "2025-09-19T15:23:24Z",
  "published" : "2024-04-05T06:30:46Z",
  "aliases" : [ "CVE-2024-22363" ],
  "summary" : "SheetJS Regular Expression Denial of Service (ReDoS)",
  "details" : "SheetJS Community Edition before 0.20.2 is vulnerable.to Regular Expression Denial of Service (ReDoS).\n\nA non-vulnerable version cannot be found via npm, as the repository hosted on GitHub and the npm package `xlsx` are no longer maintained. Version 0.20.2 can be downloaded via https://cdn.sheetjs.com/.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "xlsx"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "< 0.20.2"
    }
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2024-22363"
  }, {
    "type" : "WEB",
    "url" : "https://cdn.sheetjs.com"
  }, {
    "type" : "WEB",
    "url" : "https://cdn.sheetjs.com/advisories/CVE-2024-22363"
  }, {
    "type" : "WEB",
    "url" : "https://cwe.mitre.org/data/definitions/1333.html"
  }, {
    "type" : "PACKAGE",
    "url" : "https://git.sheetjs.com/sheetjs/sheetjs"
  }, {
    "type" : "WEB",
    "url" : "https://git.sheetjs.com/sheetjs/sheetjs/src/tag/v0.20.2"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-1333" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2024-04-08T13:47:03Z",
    "nvd_published_at" : "2024-04-05T06:15:10Z"
  }
}