CVE-2026-66730 – facil.io 0.6.0 – 0.7.6 Infinite Loop DoS via Multipart MIME Body Parser

CVE ID :CVE-2026-66730

Published : July 27, 2026, 5:16 p.m. | 39 minutes ago

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.

Severity: 8.7 | HIGH

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