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Vulnerability record · CVE-2017-20162 · published 5 January 2023

CVE-2017-20162: Vercel ms inefficient regular expression (redos) vulnerability

Vercel · Ms

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.

5.3 CVSS 3.1 Medium EPSS 0.99% · top 39.0% CWE-1333 · Inefficient regular expression (ReDoS)
5.3CVSS 3.1 base score, v2 3.5
0.99%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
11References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

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.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/vercel/ms/commit/caae2988ba2a37765d055c4eee63d383320ee662 Patch
https://github.com/vercel/ms/pull/89 ExploitIssue TrackingPatch
https://github.com/vercel/ms/releases/tag/2.0.0 PatchRelease Notes
https://vuldb.com/?ctiid.217451 Permissions RequiredThird Party Advisory
https://vuldb.com/?id.217451 Permissions RequiredThird Party Advisory
https://github.com/vercel/ms/commit/caae2988ba2a37765d055c4eee63d383320ee662 Patch
https://github.com/vercel/ms/pull/89 ExploitIssue TrackingPatch
https://github.com/vercel/ms/releases/tag/2.0.0 PatchRelease Notes
https://security.netapp.com/advisory/ntap-20241108-0002/
https://vuldb.com/?ctiid.217451 Permissions RequiredThird Party Advisory
https://vuldb.com/?id.217451 Permissions RequiredThird Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

7.5CVE-2015-8315Vercel ms inefficient regular expression (redos) vulnerabilityThe ms package before 0.7.1 for Node.js allows attackers to cause a denial of service (CPU consumption) via a long version string, aka a "regular exp…EPSS 6.8%

Source: NIST National Vulnerability Database (record CVE-2017-20162), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.