Read the docs
TI-2017-14228 Aliases CVE-2017-20162GHSA-w9mr-4mfr-499f

vercel ms index.js parse redos

Priority LOW 32CWE-1333Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · Low
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub. Impact type from CWE-1333.

Summary

A vulnerability, which was classified as problematic, has been found in vercel ms up to 1.x. This issue affects the function parse of the file index.js. The manipulation of the argument str leads to inefficient regular expression complexity. The attack may be initiated remotely. The exploit has been disclosed to the public and may be used. Upgrading to version 2.0.0 is able to address this issue. The patch is named caae2988ba2a37765d055c4eee63d383320ee662. It is recommended to upgrade the affected component. The associated identifier of this vulnerability is VDB-217451.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.01056 64th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA and NVD
Fix Fixed ms (npm): 2.0.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
vercelms1.x—No fix listedCNA
—ms (npm)before 2.0.02.0.0Patch availableGHSA-w9mr-4mfr-499f
  • ms Vendorvercel Affected 1.x Fixed in — No fix listed CNA
  • ms (npm) Vendor— Affected before 2.0.0 Fixed in 2.0.0 Patch available GHSA-w9mr-4mfr-499f

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:vercel:ms:*:*:*:*:*:node.js:*:*before 2.0.0Vulnerablevercel
  • cpe:2.3:a:vercel:ms:*:*:*:*:*:node.js:*:* Versions before 2.0.0 Vulnerable ·vercel

Remediation

  • Fix · GHSA-w9mr-4mfr-499f ms (npm) Fixed in 2.0.0 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2017-20162
  2. 2026-10-03 Alias added: GHSA-w9mr-4mfr-499f
  3. 2026-10-16 CISA SSVC decision points changed

References

Exploit 1

Patch 2

Advisory 1

Other 2

  • TI-2015-06844 The ms package before 0.7.1 for Node.js allows attackers to cause a denial of service… CVSS 3.1HIGH 7.5

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences