VULNERABILITY INTELLIGENCE

CVE-2018-20164

CVSS score5.3 MEDIUM
EPSS probability3.30%
CISA KEVNot currently listed
Published2019-02-13
Last modified2026-06-17
CVSS vectorCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Description

An issue was discovered in regex.yaml (aka regexes.yaml) in UA-Parser UAP-Core before 0.6.0. A Regular Expression Denial of Service (ReDoS) issue allows remote attackers to overload a server by setting the User-Agent header in an HTTP(S) request to a value containing a long digit string. (The UAP-Core project contains the vulnerability, propagating to all implementations.)

Weakness classification

  • CWE-185: Incorrect Regular Expression

Primary references