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TI-2026-47388 Aliases CVE-2026-66730GHSA-gc74-g85r-w7x5

facil.io 0.6.0 - 0.7.6 Infinite Loop DoS via Multipart MIME Body Parser

Priority HIGH 77CWE-835Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-835.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00784 56th percentileScored 2026-11-07
Public exploit Yes 2 exploit referencesTagged by the CNA
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
boazsegevfacil.io0.6.0 – 0.7.6—No fix listedCNA
  • facil.io Vendorboazsegev Affected 0.6.0 – 0.7.6 Fixed in — No fix listed CNA

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-66730
  2. 2026-10-03 Alias added: GHSA-gc74-g85r-w7x5

References

Exploit 2

  • TI-2026-47389 facil.io 0.7.5 - 0.7.6 HTTP/1.1 Chunked Transfer Encoding Parser Crash DoS CVSS 4.0HIGH 8.7
  • TI-2026-47387 facil.io 0.6.0 - 0.7.6 Integer Underflow DoS via Multipart MIME Body Parser CVSS 4.0HIGH 8.7
  • TI-2026-29774 Uncontrolled resource consumption in boazsegev facil.io CVSS 4.0HIGH 8.7
  • TI-2026-13899 boazsegev facil.io Public Folder http.c http_sendfile2 path traversal CVSS 4.0MEDIUM 6.9
  • TI-2026-13880 boazsegev facil.io WebSocket Frame websocket_parser.h websocket_on_protocol_error input validation CVSS 4.0MEDIUM 6.9
  • TI-2024-14668 Iodine Static File Server Path Traversal Vulnerability CVSS 3.1HIGH 7.5

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences