cvedb.io
CVE-2018-20164
MEDIUM · CVSS 5.3
EPSS exploitation probability: 0%
Published 2019-02-13T14:29:00.240 · Last modified 2026-06-17T01:52:22.617

Summary

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.)

Affected products

uaparser — user_agent_parser-core

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References

This product uses data from the NVD API but is not endorsed or certified by the NVD. Informational only; not professional security advice.