SEPTEMBER 20, 2026
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Case File

CVE-2026-66730

HIGH · CVSS 7.5 EPSS 0.60% Public Exploit

Source: NVD + CISA KEV + EPSS · Published 2026-07-27 · Last synced 2026-08-26

CyberRota Analysis

AI-Generated

The multipart body parser in facil.io versions 0.6.0 to 0.7.6 is vulnerable to a denial-of-service attack, allowing unauthenticated remote attackers to indefinitely freeze worker processes by sending specially crafted multipart/form-data requests. This results in 100% CPU utilization, effectively disabling the server until it is manually restarted. Organizations using these versions of facil.io should prioritize patching to mitigate the risk of service disruption.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

GitHub PoC Links

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2026-66730
Severity
HIGH
CVSS
7.5
EPSS
0.60%

Original NVD Description

facil.io 0.6.0 through 0.7.6 contains a denial-of-service vulnerability in the multipart body parser that allows an unauthenticated remote attacker to permanently freeze worker processes at 100% CPU by sending a multipart/form-data request with a partial closing boundary. The missing progress guard in the parser loop causes http_mime_parse to return 0 bytes consumed without setting done or error flags, causing the calling loop to re-invoke the parser on the same buffer indefinitely, exhausting all workers and permanently disabling the server until manually restarted.