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CVE-2025-63651

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Date: January 28, 2026

A use-after-free in the mk_string_char_search function (mk_core/mk_string.c) of monkey commit f37e984 allows attackers to cause a Denial of Service (DoS) via sending a crafted HTTP request to the server.

Severity Score

Related Resources (4)

https://github.com/archersec/security-advisories/blob/master/monkey/monkey-advisory-2025.md
https://github.com/monkey/monkey/issues/426
https://nvd.nist.gov/vuln/detail/CVE-2025-63651
https://www.mend.io/vulnerability-database/CVE-2025-63651

Severity Score

Weakness Type (CWE)

Use After Free

CWE-416

CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): HIGH

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