GHSA-rmmh-p597-ppvv

Source

https://github.com/advisories/GHSA-rmmh-p597-ppvv

Import Source

https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2024/02/GHSA-rmmh-p597-ppvv/GHSA-rmmh-p597-ppvv.json

JSON Data

https://api.osv.dev/v1/vulns/GHSA-rmmh-p597-ppvv

Aliases

CVE-2024-1899

Published

2024-02-26T21:31:36Z

Modified

2026-05-05T15:58:22.058391Z

Severity

5.3 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L CVSS Calculator

Summary

Showdown vulnerable to Regular Expression Denial of Service (ReDoS) in link/anchor parsing

Details

Showdownjs, versions <= 2.1.0, anchors subparser used to parse links has a nested regular expression which can lead to denial of service conditions given malicious input.

Database specific

{
    "cwe_ids": [
        "CWE-674",
        "CWE-777"
    ],
    "github_reviewed_at": "2026-04-24T20:36:01Z",
    "github_reviewed": true,
    "severity": "MODERATE",
    "nvd_published_at": "2024-02-26T19:15:07Z"
}

References

Affected packages

npm / showdown

Package

Name: showdown; View open source insights on deps.dev
Purl: pkg:npm/showdown

Affected ranges

Type: SEMVER
Events: Introduced

0Unknown introduced version / All previous versions are affected

Last affected

2.1.0

Database specific

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2024/02/GHSA-rmmh-p597-ppvv/GHSA-rmmh-p597-ppvv.json"