CVE-2020-26304: Foundation sites Denial of Service Vulnerability

MODERATE
Advisory Identifier: GHSA-p8pc-3f7w-jr5q
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CVSS 7.5
CWE-1333
Published
Advisory Summary

CVE-2020-26304 is a MODERATE (CVSS 7.5) denial of service vulnerability (CWE-1333: Inefficient Regular Expression Complexity) affecting Foundation sites libraries in the npm ecosystem. The issue involves foundation regular expression denial of service vulnerability. Remediation is available in the latest vendor maintenance releases.

CVE-2020-26304 at a Glance

CVE Identifier CVE-2020-26304
GHSA Identifier GHSA-p8pc-3f7w-jr5q
Severity MODERATE
CVSS v3.1 Base Score 7.5
CWE Classification CWE-1333: Inefficient Regular Expression Complexity
Affected Product Foundation sites
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-2020-26304

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

foundation-sites fixed: Latest secure release 
npm install foundation-sites@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 foundation-sites

How to Check if You Are Affected

To determine whether your Node.js application is affected by CVE-2020-26304, inspect your project dependencies using npm:

npm ls foundation-sites

Analyze the terminal output to locate any version of Foundation sites 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 foundation-sites 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 Foundation sites, 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

Foundation is a front-end framework. Versions 6.3.3 and prior contain one or more regular expressions that are vulnerable to Regular Expression Denial of Service (ReDoS). As of time of publication, it is unknown if any fixes are available.

CVE-2020-26304 Affected Foundation sites Versions

1 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
foundation-sites
npm/foundation-sites
npm
≤ 6.3.3

References

NVD — CVE-2020-26304 NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-26304
Foundation sites Source Repository REPOSITORY
https://github.com/foundation/foundation-sites/issues/12180
Foundation sites Source Repository REPOSITORY
https://github.com/foundation/foundation-sites
GitHub Advisory / Wiki ADVISORY
https://securitylab.github.com/advisories/GHSL-2020-290-redos-foundation-sites

Frequently Asked Questions

What is CVE-2020-26304?
CVE-2020-26304 is a security vulnerability in Foundation sites involving Foundation Regular Expression Denial of Service vulnerability under CWE-1333: Inefficient Regular Expression Complexity.
Which Foundation sites versions are affected?
Affected versions include releases prior to current release patches across affected packages: foundation-sites.
What version fixes CVE-2020-26304?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is foundation-sites affected?
Yes, foundation-sites 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-2020-26304?
CVE-2020-26304 has a CVSS v3.1 base score of 7.5 (MODERATE) 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-2020-26304?
CVE-2020-26304 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-2020-26304?
Run the dependency tree command: 'npm ls foundation-sites'. 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-p8pc-3f7w-jr5q",
  "modified" : "2024-11-13T23:24:36Z",
  "published" : "2024-10-26T21:30:46Z",
  "aliases" : [ "CVE-2020-26304" ],
  "summary" : "Foundation Regular Expression Denial of Service vulnerability",
  "details" : "Foundation is a front-end framework. Versions 6.3.3 and prior contain one or more regular expressions that are vulnerable to Regular Expression Denial of Service (ReDoS). As of time of publication, it is unknown if any fixes are available.",
  "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/E:U/U:Green"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "foundation-sites"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "6.3.3"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2020-26304"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/foundation/foundation-sites/issues/12180"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/foundation/foundation-sites"
  }, {
    "type" : "ADVISORY",
    "url" : "https://securitylab.github.com/advisories/GHSL-2020-290-redos-foundation-sites"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-1333" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2024-10-28T14:44:05Z",
    "nvd_published_at" : "2024-10-26T21:15:13Z"
  }
}