CVE-2025-63658 Denial of service in n/a

High 7.5 Published 29 Jan 2026 Updated 3 Feb 2026

Attackers can cause a Denial of Service in the Monkey web server by sending a crafted HTTP request that triggers a stack overflow.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2025-63658?

CVE-2025-63658 is a high-severity denial of service vulnerability in n/a, published on 29 Jan 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

A stack overflow in the mk_http_index_lookup function (mk_server/mk_http.c) of monkey commit f37e984 allows attackers to cause a Denial of Service (DoS) via sending a crafted HTTP request to the server.

Weakness: CWE-121

Which versions are affected by CVE-2025-63658?

It affects 1 product.

Products include Monkey-Project Monkey.

How do I fix CVE-2025-63658?

No fix has been published for CVE-2025-63658 yet. Limit exposure of the affected software until one is available.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2025-63658 being exploited?

There is no known exploitation of CVE-2025-63658 in the wild and no public exploit code.

Sources

Also known as AZL-76364, AZL-76386, GHSA-xvc7-7qxh-qw3m.