CVE-2017-16086

CVE-2017-16086 is a high-severity vulnerability in Ua-parser Project Ua-parser with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-400.

Key facts

Description

ua-parser is a port of Browserscope's user agent parser. ua-parser is vulnerable to a ReDoS (Regular Expression Denial of Service) attack when given a specially crafted UserAgent header.

Frequently asked questions

What is CVE-2017-16086?
ua-parser is a port of Browserscope's user agent parser. ua-parser is vulnerable to a ReDoS (Regular Expression Denial of Service) attack when given a specially crafted UserAgent header.
How severe is CVE-2017-16086?
CVE-2017-16086 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2017-16086 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 9% (95th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2017-16086?
CVE-2017-16086 affects Ua-parser Project Ua-parser. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2017-16086?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2017-16086 published?
CVE-2017-16086 was published on 2018-06-07 and last updated on 2026-06-17.

References

Affected products (1)

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