CVE-2026-66730

See a problem?
Please try reporting it to the source first.
Source
https://cve.org/CVERecord?id=CVE-2026-66730
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-66730.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-66730
Published
2026-07-27T16:55:27.200Z
Modified
2026-08-12T03:51:11.715194820Z
Severity
  • 8.7 (High) CVSS_V4 - 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 CVSS Calculator
Summary
facil.io 0.6.0 - 0.7.6 Infinite Loop DoS via Multipart MIME Body Parser
Details

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 httpmimeparse 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.

Database specific 
{
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
        "CWE-835"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/66xxx/CVE-2026-66730.json"
}
References

Affected packages

Git / github.com/boazsegev/facil.io

Affected ranges

Type
GIT
Repo
https://github.com/boazsegev/facil.io
Events
Introduced
13472f2f025498828b0823705c863602bdb08b70
Last affected
512a354dbd31e1895647df852d1565f9d408ed91
Database specific
Show details 
{
    "extracted_events": [
        {
            "introduced": "0.6.0"
        },
        {
            "last_affected": "0.7.6"
        }
    ],
    "source": "AFFECTED_FIELD"
}

Affected versions

0.*
0.6.0
0.6.0.beta
0.6.0.beta.2
0.6.0.beta.3
0.6.0.beta.4
0.6.0.beta.5
0.6.0.beta.6
0.6.0.beta.7
0.6.0.beta.8
0.6.0.dev
0.6.1
0.6.2
0.6.3
0.6.4
0.7.0
0.7.0.beta1
0.7.0.beta2
0.7.0.beta3
0.7.0.beta4
0.7.0.beta5
0.7.0.beta6
0.7.0.beta7
0.7.0.beta8
0.7.2
0.7.3
0.7.6

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-66730.json"