CVE-2020-7754 Regular Expression Denial of Service (ReDoS)

2020-10-2700:00:00

snyk

www.cve.org

denial of service

regular expression

npm-user-validate

CVSS3

7.5

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

AI Score

8.5

Confidence

High

EPSS

0.004

Percentile

72.6%

JSON

This affects the package npm-user-validate before 1.0.1. The regex that validates user emails took exponentially longer to process long input strings beginning with @ characters.

CNA Affected

[
  {
    "product": "npm-user-validate",
    "vendor": "n/a",
    "versions": [
      {
        "lessThan": "1.0.1",
        "status": "affected",
        "version": "unspecified",
        "versionType": "custom"
      }
    ]
  }
]