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Vulnerabilities

Vulnerability · CVE-2017-20162

A vulnerability, which was classified as problematic, has been found in vercel ms up to 1.x.

Published Jan 5, 2023 · catalog updated Oct 15, 2026 · A vulnerability, which was

Check if you run it

No confirmed exploitation is on record for CVE-2017-20162. EPSS is 1.02%. Act only if a listed version of A vulnerability, which was is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (A vulnerability, which was).
  • No version range is stored. A customer cannot check an installed version against this record.
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Medium5.3
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
1.02%
Remediation
Advisory link
Affected products
cpe 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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe vercel/msversion unspecified

How to fix CVE-2017-20162

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2017-20162. EPSS is 1.02%. Act only if a listed version of A vulnerability, which was is installed.

Which versions are affected?

Affected version ranges are not on this record. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-1333: Inefficient Regular Expression Complexity. EPSS 1.02%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Jan 5, 2023 · NIST NVD

    Detected

    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.

  2. Oct 15, 2026 · NIST NVD

    Updated

    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.

Sources

  • CVE.orgVulnerability recordCVE-2017-20162

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2017-20162

    30-day exploitation probability 1.0%

    first.org
  • NIST NVDVulnerability recordCVE-2017-20162

    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.

    nvd.nist.gov

References

Freshness

Last verified in this catalog Oct 16, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.