CVE-2019-3871
CVSS v3
8.8
HIGH
EPSS Score
12.6 %
exploit probability, as of 2026-09-25
CISA KEV
No
known exploited
Exploitation
—
SSVC status
Description
A vulnerability was found in PowerDNS Authoritative Server before 4.0.7 and before 4.1.7. An insufficient validation of data coming from the user when building a HTTP request from a DNS query in the HTTP Connector of the Remote backend, allowing a remote user to cause a denial of service by making the server connect to an invalid endpoint, or possibly information disclosure by making the server connect to an internal endpoint and somehow extracting meaningful information about the response
Technical details
- Published
- 2019-03-21
Frequently asked questions
What is CVE-2019-3871?
A vulnerability was found in PowerDNS Authoritative Server before 4.0.7 and before 4.1.7. An insufficient validation of data coming from the user when building a HTTP request from a DNS query in the HTTP Connector of the Remote backend, allowing a remote user to cause a denial of service by making the server connect to an invalid endpoint, or possibly information disclosure by making the server connect to an internal endpoint and somehow extracting meaningful information about the response
Is CVE-2019-3871 actively exploited?
Active exploitation of CVE-2019-3871 has not been confirmed. Its EPSS score was 12.6% on 2026-09-25, the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2019-3871?
CVE-2019-3871 has a CVSS v3 base score of 8.8 (HIGH severity).
Is CVE-2019-3871 affecting your environment?
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