CVE-2020-11709
CVSS v3
7.5
HIGH
EPSS Score
1.7 %
exploit probability, as of 2026-09-25
CISA KEV
No
known exploited
Exploitation
—
SSVC status
Description
cpp-httplib through 0.5.8 does not filter \\r\\n in parameters passed into the set_redirect and set_header functions, which creates possibilities for CRLF injection and HTTP response splitting in some specific contexts.
Technical details
- Published
- 2020-04-12
Frequently asked questions
What is CVE-2020-11709?
cpp-httplib through 0.5.8 does not filter \\r\\n in parameters passed into the set_redirect and set_header functions, which creates possibilities for CRLF injection and HTTP response splitting in some specific contexts.
Is CVE-2020-11709 actively exploited?
Active exploitation of CVE-2020-11709 has not been confirmed. Its EPSS score was 1.7% on 2026-09-25, the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2020-11709?
CVE-2020-11709 has a CVSS v3 base score of 7.5 (HIGH severity).
Is CVE-2020-11709 affecting your environment?
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