facil.io 0.6.0 - 0.7.6 Infinite Loop DoS via Multipart MIME Body Parser
41Vexday Risk Score
No sign of exploitation. It has a public proof of concept.
ssvc Attendcvss 8.7epss 0.5%
from disclosure to weapon0 days
Published on NVDJul 27
1st PoCJul 24
exploitation probability
0.5%top 62% of all CVEs
observed exploitation
nono source reports it
2 public exploit(s)
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.
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Affected products
boazsegev · facil.iopublic PoCs found — 2
githubgithub.com/theopaid/CVE-2026-66730-Infinite-Loop-DoS-in-facil.io-MIME-Parser★ 0cve_referencegithub.com/theopaid/Infinite-Loop-DoS-in-facil.io-MIME-Parserunverified⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.