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CVE-2020-28501
Regular Expression Denial of Service (ReDoS)
Medium5.3EPSS 1.5%
- Published
- Updated
- Reserved
- Assigned by
- snyk
Description
This affects the package es6-crawler-detect before 3.1.3. No limitation of user agent string length supplied to regex operators.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| snykCNA (assigner) | 3.1 | Medium5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L |
| NVDNVD · Modified | 3.1 | High7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 1.5% · top 26% of all CVEs (6 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.3.
Weakness
- Regular Expression Denial of Service (ReDoS)
Affected products
es6-crawler-detect
- affected unspecified – < 3.1.3
Affected packages
From reviewed advisories of the GitHub Advisory Database.
- npmes6-crawler-detectGHSA-jxg6-fhwc-9v9c (opens in a new tab)
References (2)
- https://snyk.io/vuln/SNYK-JS-ES6CRAWLERDETECT-1051529 (opens in a new tab)x_refsource_MISCx_transferred
- https://github.com/JefferyHus/es6-crawler-detect/pull/27 (opens in a new tab)x_refsource_MISCx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-jxg6-fhwc-9v9c (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2020-28501)Record last updated .