Search/CVE-2018-20164
● CVE — Medium

CVE-2018-20164

VendoruaparserProductuser agent parser-coreDiscoveredFeb 13, 2019UpdatedNov 21, 2024

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.)

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CVSS v3.1
5.3 MEDIUM
EPSS
3.30%
probability of exploitation in 30 days
CISA KEV
Not listed
no confirmed exploitation reported
News coverage
0
sources referencing this CVE
Related IOCs
0
seen in the same coverage
EPSS Trend
Aug 16, 2026 → Sep 23, 2026
● 0.00pp
3.30% → 3.30% over 9 tracked changes
CVSS v3.1 Detail
Attack VectorNETWORK
Attack ComplexityLOW
Privileges RequiredNONE
User InteractionNONE
ScopeUNCHANGED
ConfidentialityNONE
IntegrityNONE
AvailabilityLOW
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Connections
2 relationships
Timeline
disclosure → media coverage
Feb 13, 2019
Disclosure — published as a CVE record. · last revised by NVD Nov 21, 2024