Vulnerability Description
A vulnerability in the CivetWeb library's function mg_handle_form_request allows remote attackers to trigger a denial of service (DoS) condition. By sending a specially crafted HTTP POST request containing a null byte in the payload, the server enters an infinite loop during form data parsing. Multiple malicious requests will result in complete CPU exhaustion and render the service unresponsive to further requests. This issue was fixed in commit 782e189. This issue affects only the library, standalone executable pre-built by vendor is not affected.
Related Weaknesses (CWE)
References
- https://cert.pl/en/posts/2025/09/CVE-2025-9648
- https://github.com/civetweb/civetweb
- https://github.com/civetweb/civetweb/commit/782e18903515f43bafbf2e668994e82bdfa5
- https://github.com/civetweb/civetweb/issues/1348
FAQ
What is CVE-2025-9648?
CVE-2025-9648 is a documented vulnerability. A vulnerability in the CivetWeb library's function mg_handle_form_request allows remote attackers to trigger a denial of service (DoS) condition. By sending a specially crafted HTTP POST request conta...
How severe is CVE-2025-9648?
CVSS scoring is not yet available for CVE-2025-9648. Check NVD for updates.
Is there a patch for CVE-2025-9648?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.