Vulnerabilities in pkg:npm/html-minifier

PACKAGE
Advisory Identifier: GHSA-pfq8-rq6v-vf5m
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Advisory Summary

CVE-2022-37620 is a HIGH (CVSS 7.5) denial of service vulnerability (CWE-400: Uncontrolled Resource Consumption) affecting Html minifier libraries in the npm ecosystem. The issue involves kangax html-minifier redos vulnerability. Remediation is available in the latest vendor maintenance releases.

1 Known Advisory Record(s)
Package Vulnerability Intelligence

pkg:npm/html-minifier

1 Known Advisory Record(s)

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

Advisory ID CVE / NVD Severity Summary
GHSA-pfq8-rq6v-vf5m CVE-2022-37620 HIGH kangax html-minifier REDoS vulnerability

CVE-2022-37620 at a Glance

CVE Identifier CVE-2022-37620
GHSA Identifier GHSA-pfq8-rq6v-vf5m
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification CWE-400: Uncontrolled Resource Consumption
Affected Product Html minifier
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-2022-37620

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

html-minifier fixed: Latest secure release 
npm install html-minifier@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 html-minifier

How to Check if You Are Affected

To determine whether your Node.js application is affected by CVE-2022-37620, inspect your project dependencies using npm:

npm ls html-minifier

Analyze the terminal output to locate any version of Html minifier 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 html-minifier 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-400: Uncontrolled Resource Consumption, where the product does not properly control the allocation and maintenance of a limited resource. In Html minifier, 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 Regular Expression Denial of Service (ReDoS) flaw was found in kangax html-minifier 4.0.0 because of the reCustomIgnore regular expression.

CVE-2022-37620 Affected Html minifier Versions

1 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
html-minifier
npm/html-minifier
npm
≤ 4.0.0

References

NVD — CVE-2022-37620 NVD
https://nvd.nist.gov/vuln/detail/CVE-2022-37620
Html minifier Source Repository REPOSITORY
https://github.com/kangax/html-minifier/issues/1135
Html minifier Source Repository REPOSITORY
https://github.com/kangax/html-minifier
Html minifier Source Repository REPOSITORY
https://github.com/kangax/html-minifier/blob/51ce10f4daedb1de483ffbcccecc41be1c873da2/src/htmlminifier.js#L1338
Html minifier Source Repository REPOSITORY
https://github.com/kangax/html-minifier/blob/51ce10f4daedb1de483ffbcccecc41be1c873da2/src/htmlminifier.js#L294
Html minifier Security Information SECURITY
https://security.snyk.io/vuln/SNYK-JS-HTMLMINIFIER-3091181

Frequently Asked Questions

What is CVE-2022-37620?
CVE-2022-37620 is a security vulnerability in Html minifier involving kangax html-minifier REDoS vulnerability under CWE-400: Uncontrolled Resource Consumption.
Which Html minifier versions are affected?
Affected versions include releases prior to current release patches across affected packages: html-minifier.
What version fixes CVE-2022-37620?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is html-minifier affected?
Yes, html-minifier 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-2022-37620?
CVE-2022-37620 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-2022-37620?
CVE-2022-37620 is classified under CWE-400: Uncontrolled Resource Consumption (The product does not properly control the allocation and maintenance of a limited resource.).
How can I check npm dependencies for CVE-2022-37620?
Run the dependency tree command: 'npm ls html-minifier'. 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-pfq8-rq6v-vf5m",
  "modified" : "2025-06-11T17:34:37Z",
  "published" : "2022-10-31T19:00:36Z",
  "aliases" : [ "CVE-2022-37620" ],
  "summary" : "kangax html-minifier REDoS vulnerability",
  "details" : "A Regular Expression Denial of Service (ReDoS) flaw was found in kangax html-minifier 4.0.0 because of the reCustomIgnore regular expression.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
  }, {
    "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"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "html-minifier"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "4.0.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2022-37620"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/kangax/html-minifier/issues/1135"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/kangax/html-minifier"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/kangax/html-minifier/blob/51ce10f4daedb1de483ffbcccecc41be1c873da2/src/htmlminifier.js#L1338"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/kangax/html-minifier/blob/51ce10f4daedb1de483ffbcccecc41be1c873da2/src/htmlminifier.js#L294"
  }, {
    "type" : "WEB",
    "url" : "https://security.snyk.io/vuln/SNYK-JS-HTMLMINIFIER-3091181"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-1333", "CWE-400" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2024-04-22T23:06:37Z",
    "nvd_published_at" : "2022-10-31T12:15:00Z"
  }
}