CVE-2025-63656
CVSS v3
7.5
HIGH
EPSS Score
1.1 %
exploit probability, as of 2026-09-25
CISA KEV
No
known exploited
Exploitation
none
SSVC status
Description
An out-of-bounds read in the header_cmp function (mk_server/mk_http_parser.c) of monkey commit f37e984 allows attackers to cause a Denial of Service (DoS) via sending a crafted HTTP request to the server.
Technical details
- Published
- 2026-01-29
- Last Modified
- 2026-02-13
Frequently asked questions
What is CVE-2025-63656?
An out-of-bounds read in the header_cmp function (mk_server/mk_http_parser.c) of monkey commit f37e984 allows attackers to cause a Denial of Service (DoS) via sending a crafted HTTP request to the server.
Is CVE-2025-63656 actively exploited?
Active exploitation of CVE-2025-63656 has not been confirmed. Its EPSS score was 1.1% on 2026-09-25, the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2025-63656?
CVE-2025-63656 has a CVSS v3 base score of 7.5 (HIGH severity).
Is CVE-2025-63656 affecting your environment?
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