CVE-2026-66730 (GCVE-0-2026-66730)
Vulnerability from cvelistv5 – Published: 2026-07-27 16:55 – Updated: 2026-07-31 18:19 X_Open Source
VLAI
EPSS
VEX
Title
facil.io 0.6.0 - 0.7.6 Infinite Loop DoS via Multipart MIME Body Parser
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.
Severity
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-27 18:20 UTC
CWE
- CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://tpaidakis.com/writeups/facilio-parser-dos/ | technical-descriptionexploit |
| https://github.com/theopaid/Infinite-Loop-DoS-in-… | technical-descriptionexploit |
| https://www.vulncheck.com/advisories/facil-io-inf… | third-party-advisory |
Impacted products
Date Public
2026-07-24 00:00
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Browse all ATT&CK techniques and the vulnerabilities related to each.
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